#alter system set memory_max_target=80G scope=spfile;
#alter system set memory_target=80G scope=spfile;
alter system set memory_target=0  scope=spfile；
alter system set sga_max_size=64G scope=spfile;
alter system set sga_target=64G scope=spfile;
alter system set pga_aggregate_target=16G scope=spfile;