OceanBase 使用内存大页技术探索

  • plvision

    2023-04-03 20:12:32
  • 数据库开发技术
  • 原创
4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">




本文主要探讨 OceanBase 安装部署时如何使用 Linux 的大页技术。个人观点，如果理解错误，欢迎留言指出。

 

熟悉 ORACLE 的朋友都知道，ORACLE SGA 大小稍具规模时，在 Linux 上是建议使用内存大页（HugePage），其理由主要是降低页管理对内存的消耗，性能更好更稳定之类。OceanBase 数据库的一个显著特点就是内存特别大，从理论上说更应该使用大页技术。Linux 还有个透明大页技术（THP, transparent hugepages），是根据应用需求自动分配大页，过程对应用透明，所以叫透明大页。但是这个特性对数据库并不友好。所以 ORACLE 都是建议关闭透明大页，使用大页技术。


 

Linux 大页技术


4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">首先简单回顾一下 Linux 的内存映射和页表技术。

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">物理内存大小是有限的，操作系统为每个程序分配了独立的更大的虚拟内存空间。每个进程的虚拟内存跟物理内存有个映射关系。这个映射保存在页表里，CPU 访问虚拟内存时查页表并转换为物理内存，这个在硬件 MMU 内部完成。

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">内存映射是以内存页为单位，默认大小是 4KB 。在 64位系统中，Linux 只使用了 64位虚拟地址中的前 48 位，并且分为 5 部分。最后一部分长度为 12 ，对应的是物理内存页内偏移地址（容量 4KB）。前面 4 部分设计主要是降低页表管理成本，不是本文重点。

 

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">现在物理内存都很大，4KB 的页表就显得非常小，导致页表项非常多，占用的内存也很大。所以才有更大的内存页出现了。如 2MB 的页表（据说还有支持1GB，没见过不讨论）。此时虚拟内存地址只需要 4 部分，最后一部分长度 21 位，是内存大页内的偏移地址。

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im"> 

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">大页的好处就是：

  • 减少 TLB（Translation Lookaside Buffer） 的失效情况。

  • 减少 页表 的内存消耗。

  • 减少 PageFault（缺页中断）的次数。

 

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">要使用大页（HugePage）需要修改Linux 内核参数  vm.nr_hugepages ，并且应用代码也要支持。技术细节可能是使用 mmap 申请 2MB 对齐的内存映射到匿名的 Hugetlb 文件系统。

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im"> 

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">Redhat 6 推出了透明大页技术，可以自动根据应用内存申请需求分配出大页。为了满足这个需求，内核尝试申请物理地址连续的内存。如果找不到就会由后台进程 khugepaged 周期性的将零散的小内存页替换为内存大页。内核的这个技术就是透明大页技术（THP），但并不适合数据库场景。所以基本上所有关系数据库都会要求关闭透明大页。

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im"> 

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">下面我们看一个测试环境。

 

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">透明大页示例

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">默认情况下 Linux 或 CentOS 都会开启透明大页，关闭大页。查看下面文件可以确认这点。并且有内核进程  [khugepaged] 。

[root@OB03 soft]# tree /sys/kernel/mm/transparent_hugepage//sys/kernel/mm/transparent_hugepage/├── defrag├── enabled├── khugepaged│   ├── alloc_sleep_millisecs│   ├── defrag│   ├── full_scans│   ├── max_ptes_none│   ├── pages_collapsed│   ├── pages_to_scan│   └── scan_sleep_millisecs└── use_zero_page
1 directory, 10 files
[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled[always] madvise never[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag[always] madvise never[root@OB03 soft]# ps -ef | grep khugepaged |grep -v greproot     24101     2  0 06:21 ?        00:00:00 [khugepaged]

 

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">当前测试环境是一台 OB 服务器（虚拟机），内存只有 24 GB ，OB 进程 observer 大概使用了 16GB 。

 

[root@OB03 soft]# cat /proc/meminfo | grep AnonHugePagesAnonHugePages:    4298752 kB[root@OB03 soft]# cat /proc/meminfo | grep PageTablePageTables:        49576 kB[root@OB03 soft]# free -h              total        used        free      shared  buff/cache   availableMem:            23G         15G        2.9G        497M        5.1G        2.1GSwap:            0B          0B          0B

 

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">从上面查询知 THP 分配的 匿名大页有 4298752 kB（4 GB），页表的大小约 49576 kB（48MB）。

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">再查看一下 OB 进程  observer 的透明大页使用量，能够看到一部分进程的内存有一部分是用匿名大页。

[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME " " $0; system("ps -fp " gensub(/.*\/([0-9]+).*/, "\\1", "g", FILENAME))}}' /proc/*/smaps/proc/898/smaps AnonHugePages:      2048 kBUID        PID  PPID  C STIME TTY          TIME CMDpolkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug/proc/898/smaps AnonHugePages:      2048 kBUID        PID  PPID  C STIME TTY          TIME CMDpolkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug/proc/909/smaps AnonHugePages:      2048 kBUID        PID  PPID  C STIME TTY          TIME CMDroot       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon/proc/9629/smaps AnonHugePages:    366592 kBUID        PID  PPID  C STIME TTY          TIME CMDadmin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer/proc/9629/smaps AnonHugePages:     22528 kBUID        PID  PPID  C STIME TTY          TIME CMDadmin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer/proc/9629/smaps AnonHugePages:     88064 kBUID        PID  PPID  C STIME TTY          TIME CMDadmin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer

 

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">禁用透明大页 THP

 

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。

[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defragalways madvise [never][root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabledalways madvise [never][root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep[root@OB03 soft]#[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME " " $0; system("ps -fp " gensub(/.*\/([0-9]+).*/, "\\1", "g", FILENAME))}}' /proc/*/smaps/proc/898/smaps AnonHugePages:      2048 kBUID        PID  PPID  C STIME TTY          TIME CMDpolkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug/proc/898/smaps AnonHugePages:      2048 kBUID        PID  PPID  C STIME TTY          TIME CMDpolkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug/proc/909/smaps AnonHugePages:      2048 kBUID        PID  PPID  C STIME TTY          TIME CMDroot       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon/proc/9629/smaps AnonHugePages:    366592 kBUID        PID  PPID  C STIME TTY          TIME CMDadmin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer/proc/9629/smaps AnonHugePages:     22528 kBUID        PID  PPID  C STIME TTY          TIME CMDadmin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer/proc/9629/smaps AnonHugePages:     90112 kBUID        PID  PPID  C STIME TTY          TIME CMDadmin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">要永久禁用 THP 有两个方法。

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">

  • 方法一：修改开机启动文件

 

vim + /etc/rc.d/rc.local 
if test -f /sys/kernel/mm/transparent_hugepage/enabled; thenecho never > /sys/kernel/mm/transparent_hugepage/enabledfiif test -f /sys/kernel/mm/transparent_hugepage/defrag; thenecho never > /sys/kernel/mm/transparent_hugepage/defragfi
4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改  "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份  "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">修改启动文件权限。
chmod +x /etc/rc.d/rc.local
4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改  "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份  "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">最后一步很重要，4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改  "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份  "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">否则有可能不会生效。

 

  • 方法二：修改  grub.conf

 

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">备份  grub.conf 文件。

cp /etc/default/grub /etc/default/grub.`date +%F`.bak
 

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">修改  grub.conf 文件。

vim /etc/default/grubGRUB_CMDLINE_LINUX="rd.lvm.lv=centos/root rd.lvm.lv=centos/swap rhgb quiet numa=off elevator=deadline transparent_hugepage=never"

 

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">执行命令 生成  grub.cfg 配置文件。

grub2-mkconfig
 

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">上面修改需要重启主机才生效。不过重启之前还建议同时设置一下大页（HugePage）。

 

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">设置大页 HugePage

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">首先判断一下是否开启了大页。

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">查看系统的大页使用量

[root@OB03 ~]# grep HugePages /proc/meminfoAnonHugePages:      2048 kBHugePages_Total:       0HugePages_Free:        0HugePages_Rsvd:        0HugePages_Surp:        0

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">HugePages_Total 为 0 表示没有开启大页。

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">这里额外做一步看看 OB 进程的大页使用信息（当然肯定没有用，只是为了跟后面操作对比）。

 

[root@OB03 ~]# numastat -p `pidof observer`

Per-node process memory usage (in MBs) for PID 5034 (observer)                           Node 0          Node 1           Total                  --------------- --------------- ---------------Huge                         0.00            0.00            0.00Heap                         0.00            0.00            0.00Stack                        0.06            0.14            0.20Private                   6825.28         4455.12        11280.39----------------  --------------- --------------- ---------------Total                     6825.34         4455.25        11280.59[root@OB03 ~]#

[root@OB03 ~]# grep -B 11 'KernelPageSize:     2048 kB' /proc/`pidof observer`/smaps \   | grep "^Size:" \   | awk 'BEGIN{sum=0}{sum+=$2}END{print sum/1024}'0

 

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">这里使用了 NUMA 的命令  numastat ，可以看到两个 NUMA node 的内存分配信息。在这个测试环境里，默认开启了 NUMA 。通常数据库都是建议关掉 NUMA 。这是另外一个话题，不在这里展开。我们暂时忽略这个。NUMA 只是可能会影响性能，并不会影响大页的使用。

 

 

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">开启大页的方法很简单，就是修改内核参数文件  /etc/sysctl.conf ，指定大页内存大小。由于大页的页大小是 2MB，所以实际大页数量是大页内存总大小除以页大小的值。这里我分配 16GB+ 大页内存。比实际  observer 进程需要的内存稍大一些。

 

[root@OB03 ~]# vim + /etc/sysctl.confvm.nr_hugepages = 8200

 

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">在修改内核参数后不要轻易的运行  sysctl -p 命令生效。首先要判断一下主机的可用内存是否足够，否则可能会导致服务器 Hang。

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">通常做法是重启服务器。

 

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">OB 使用大页示例

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">再次运行命令 确认操作系统大页设置生效了。

 

[root@OB03 ~]# grep HugePages /proc/meminfoAnonHugePages:      2048 kBHugePages_Total:    8200HugePages_Free:     8200HugePages_Rsvd:        0HugePages_Surp:        0

 

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">HugePages_Total 值大于 0 ，并且是之前的设置值，说明大页生效了。此时 OB 进程还没有启动，所以还没有程序使用大页。这里还看到  AnonHugePages 也有值，其原因是有一个程序还使用了透明大页，由于很小可以忽略不计。

 

[root@OB03 ~]# free -h              total        used        free      shared  buff/cache   availableMem:            23G         16G        5.1G        8.9M        1.4G        2.7GSwap:            0B          0B          0B[root@OB03 ~]#

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">从 free 命令看出，当开启大页后， used 内存就会包含大页的内存，这部分属于专用内存。

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im"> 

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">前面说了，光操作系统支持大页还不够，还要应用程序支持，也就是看 OB 进程  observer 是否支持大页。从 OB 官网文档看，从企业版 V2.2.50 开始才支持大页，参数名：use_large_pages ，默认值是  false ，即不使用内存大页。

 

 

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">就当前重启的这台服务器而言，OB 进程还没有拉起。实际上应该无法拉起。因为主机大部分内存已经分配给大页了，而 OB 进程默认是不使用内存大页的，所以 OB 进程启动大概率是会报内存不足错误。

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im"> 

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">下面在命令行下启动 OB 进程，增加参数使用内存大页。

 

[admin@OB03 ~]$ cd oceanbase/[admin@OB03 oceanbase]$ bin/observer -o "use_large_pages=true"bin/observer -o use_large_pages=trueoptstr: use_large_pages=true[admin@OB03 oceanbase]$ ps -ef|grep observer |grep -v grepadmin    13167     1 99 14:50 ?        00:00:23 bin/observer -o use_large_pages=true[admin@OB03 oceanbase]$

 

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">为了观察 OB 对大页内存使用效果，我单独开个窗口对 这个节点上的 OB 租户跑 BenchmarkSQL TPC-C 压测程序。大家可以通过下面观察的结果再跟之前分享的 ORACLE 内存的观察效果进行对比。

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im"> 

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">首先观察  free 命令的输出。这一块跟之前没有大的变化。OB 的内存计算在  used 内，不在  buff/cache 中。

 

[root@OB03 ~]# grep HugePages /proc/meminfoAnonHugePages:      2048 kBHugePages_Total:    8200HugePages_Free:      705HugePages_Rsvd:      704HugePages_Surp:        0
[root@OB03 ~]# free -h              total        used        free      shared  buff/cache   availableMem:            23G         17G        4.0G        8.9M        1.6G        1.7GSwap:            0B          0B          0B[root@OB03 ~]#

 

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">然后观察  atop 命令的输出。可以看到两个 NUMA node 的内存使用情况。其中字段  hptot 有值就表示开启了大页，字段  hpuse 表示实际大页内存的使用大小，这个随着 OB 业务读写而变化。

 

 

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">再单独观察一下 OB 进程的内存使用情况，这个也是随着 OB 读写活动而变化。

[root@OB03 ~]# numastat -p `pidof observer`
Per-node process memory usage (in MBs) for PID 31722 (observer)                           Node 0          Node 1           Total                  --------------- --------------- ---------------Huge                      7936.00         2124.00        10060.00Heap                         0.00            0.00            0.00Stack                        0.02            0.17            0.20Private                    285.88          746.56         1032.43----------------  --------------- --------------- ---------------Total                     8221.90         2870.73        11092.63[root@OB03 ~]#[root@OB03 ~]# grep -B 11 'KernelPageSize:     2048 kB' /proc/`pidof observer`/smaps \>    | grep "^Size:" \>    | awk 'BEGIN{sum=0}{sum+=$2}END{print sum/1024}'11786

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">从上面也可以看出开启 NUMA 后，两个 NUMA node 实际分配的内存并不一样。由于 OB 数据库是单进程程序，没必要做 NUMA CPU 绑定，内存的这个行为肯定是会影响 OB 的最大性能。所以 OB 部署也是建议禁用 NUMA 特性（需要从主机 BIOS 里禁用，具体要咨询服务器厂商）。

 

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">更多阅读

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">以上是理论分析加功能测试，学术界此前也有论文（附件4）说大页在 NUMA 架构下可能对性能有害。实际效果如何还是要对比测试看看。

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">据了解蚂蚁业务 OB 集群使用内存大页的，但是企业版 OCP 部署的 OB 集群好像默认并没有开启使用内存大页的参数。官方文档目前还没有最佳实践，欢迎有用过的朋友留言交流经验。

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im"> 

4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"2w2j\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"0mng\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"Lo9W\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"FE6u\"|36:17|direction:\"ltr\""],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"TCkb\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"cV8z\"|36:17|direction:\"ltr\""],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"2XgY\"|36:17|direction:\"ltr\""],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"WY4D\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fkRI\"|36:17|direction:\"ltr\""],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"A7El\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"Dnct\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"7t1j\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"uFRp\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"Dtx1\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"l77A\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Jvy9\"|36:17|direction:\"ltr\""],[20,"/proc/9629/smaps AnonHugePages:     88064 kB"],[20,"\n","24:\"IE0Y\"|36:17|direction:\"ltr\""],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"xPwl\"|36:17|direction:\"ltr\""],[20,"admin     9629     1 99  2022 ?        143-02:49:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"Tx8J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"7IKm\"|36:17|direction:\"ltr\""],[20,"\n","24:\"R6x4\""],[20,"禁用透明大页 THP"],[20,"\n","24:\"8Eie\"|32:1|direction:\"ltr\""],[20,"\n","24:\"nbhy\"|direction:\"ltr\""],[20,"透明大页可以在运行时禁用，这只影响于后续的内存分配。已经分配的匿名大页并不会回收。"],[20,"\n","24:\"Pj7N\"|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"dfnR\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"3dyY\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"RWVC\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"cqtQ\"|36:17|direction:\"ltr\""],[20,"[root@OB03 soft]# cat /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"Qmkq\"|36:17|direction:\"ltr\""],[20,"always madvise [never]"],[20,"\n","24:\"j2HQ\"|36:17"],[20,"[root@OB03 soft]# ps -ef | grep khugepaged |grep -v grep"],[20,"\n","24:\"YUMo\"|36:17"],[20,"[root@OB03 soft]#"],[20,"\n","24:\"PaYU\"|36:17"],[20,"[root@OB03 soft]# awk  '/AnonHugePages/ { if($2>4){print FILENAME \" \" $0; system(\"ps -fp \" gensub(/.*\\/([0-9]+).*/, \"\\\\1\", \"g\", FILENAME))}}' /proc/*/smaps"],[20,"\n","24:\"8yVR\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"6shP\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"wnvR\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"qLI3\"|36:17"],[20,"/proc/898/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"hY4P\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"RcWy\"|36:17"],[20,"polkitd    898     1  0  2022 ?        00:04:01 /usr/lib/polkit-1/polkitd --no-debug"],[20,"\n","24:\"XRTM\"|36:17"],[20,"/proc/909/smaps AnonHugePages:      2048 kB"],[20,"\n","24:\"XHVv\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"iBb7\"|36:17"],[20,"root       909     1  0  2022 ?        00:30:19 /usr/sbin/NetworkManager --no-daemon"],[20,"\n","24:\"Djtx\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:    366592 kB"],[20,"\n","24:\"dooi\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"KIjq\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"J2vD\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     22528 kB"],[20,"\n","24:\"KoMp\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"r99R\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"QcWB\"|36:17"],[20,"/proc/9629/smaps AnonHugePages:     90112 kB"],[20,"\n","24:\"4AgY\"|36:17"],[20,"UID        PID  PPID  C STIME TTY          TIME CMD"],[20,"\n","24:\"fKFk\"|36:17"],[20,"admin     9629     1 99  2022 ?        143-02:53:29 /home/admin/oceanbase/bin/observer"],[20,"\n","24:\"06dM\"|36:17"],[20,"\n","24:\"dayX\"|36:17"],[20,"要永久禁用 THP 有两个方法。"],[20,"\n","24:\"1aFa\"|direction:\"ltr\""],[20,"方法一：修改开机启动文件"],[20,"\n","24:\"I2xZ\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"QQRJ\"|direction:\"ltr\""],[20,"vim + /etc/rc.d/rc.local "],[20,"\n","24:\"8vMH\"|36:17|direction:\"ltr\""],[20,"\n","24:\"0W3j\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/enabled; then"],[20,"\n","24:\"3Yap\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/enabled"],[20,"\n","24:\"T5MV\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"D5zt\"|36:17|direction:\"ltr\""],[20,"if test -f /sys/kernel/mm/transparent_hugepage/defrag; then"],[20,"\n","24:\"JJjk\"|36:17|direction:\"ltr\""],[20,"echo never > /sys/kernel/mm/transparent_hugepage/defrag"],[20,"\n","24:\"74iF\"|36:17|direction:\"ltr\""],[20,"fi"],[20,"\n","24:\"CAoL\"|36:17|direction:\"ltr\""],[20,"\n","24:\"nrqf\"|36:17|direction:\"ltr\""],[20,"chmod +x /etc/rc.d/rc.local"],[20,"\n","24:\"4rrh\"|36:17|direction:\"ltr\""],[20,"最后一步很重要，否则有可能不会生效。"],[20,"\n","24:\"7uqh\"|direction:\"ltr\""],[20,"\n","24:\"wLIv\"|direction:\"ltr\""],[20,"方法二：修改 "],[20,"grub.conf","code:true"],[20," "],[20,"\n","24:\"0FBU\"|bullet-id:\"UNZe\"|bullet:\"circle\"|direction:\"ltr\""],[20,"\n","24:\"7d8P\"|direction:\"ltr\""],[20,"备份 "],[20,"grub.conf","code:true"],[20," 文件。"],[20,"\n","24:\"aUMi\"|direction:\"ltr\""],[20,"cp /etc/default/grub /etc/default/grub." date="date" f="f" quot="quot" etc='\"rd.lvm.lv=centos/root' rd="centos/swap" rhgb="rhgb" quiet="quiet" numa="off" elevator="deadline" transparent_hugepage='never\""],[20,"\n","24:\"aaUJ\"|36:17|direction:\"ltr\""],[20,"\n","24:\"ch7J\"|36:17|direction:\"ltr\""],[20,"\n","24:\"Od8z\"|direction:\"ltr\""],[20,"执行命令' hugepage="hugepage" grep="grep" hugepages="hugepages" proc="proc" nbsp="nbsp" kb="kb" ob="ob" numastat="numastat" p="p" pidof="pidof" observer="observer" process="process" memory="memory" usage="usage" in="in" mbs="mbs" for="for" pid="pid" node="node" b="b" kernelpagesize:="kernelpagesize:" awk="awk" begin="0}{sum+=$2}END{print" sum="sum" mb="mb" gb="gb" vim="vim" hang="hang" free="free" h="h" total="total" used="used" shared="shared" buff="buff" g="g" m="m" v2="v2" cd="cd" oceanbase="oceanbase" bin="bin" o="o" use_large_pages='true"],[20,"\n","24:\"RY6H\"|36:17|direction:\"ltr\""],[20,"optstr:' ps="ps" ef="ef" v="v" benchmarksql="benchmarksql" tpc-c="tpc-c" oracle="oracle" cpu="cpu" bios="bios" ocp="ocp" pagecache="pagecache" qq="qq" zhihu="zhihu" data-copy-origin="https://shimo.im">关于传统数据库内存的分析可以参考下面文章：

 

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