NBU9.0版本恢复Oracle19C

开4通道恢复完成首批备份集：

不自动切换备份集恢复，RMAN无进度1小时后报错：

这套库3T左右，恢复小库200G的无任何问题。

NBU环境是华为云，网络端口已按照NBU文档开通：

经过朋友官方查到信息如下：

Below are tuning examples for several different platforms.  Please check your O/S vendor documentation for details on these or equivalent parameters.  The goals are three-fold:

1. Send TCP Keepalives more frequently and detect loss of the remote endpoint within 15 minutes.
2. Send TCP Keepalives successfully (within 15 minutes), before idle socket timeout (typically 60 or 30 minutes).
3. Make sure TCP Keepalives retry at least as robustly as TCP data retransmission to prevent spurious connection drop.  By default, Windows typically retransmits either 5 or 10 times and drops the connection within 10 to 150 seconds if no response.  By default, UNIX/Linux typically retransmits 10 to 20 times over 8 to 20 minutes.

链接地址：

https://www.veritas.com/content/support/en_US/article.100028680

服务端修改参数如下：

tcp_keepalive_time = 700

tcp_keepalive_intvl = 10

tcp_keepalive_probes = 20

最后一切恢复正常。

小记一下，好记性不如烂笔头，嘿嘿！