标题: Standby Experiencing High "Standby Query SCN Advance" Waits. [打印本页] 作者: 刘泽宇 时间: 2023-10-22 10:46 标题: Standby Experiencing High "Standby Query SCN Advance" Waits. 现象:
After moving the read only traffic to Standby and starting processing on Primary , "Standby Query SCN Advance" waits started to show up on the Standby database.
更改:
Moved the read only traffic to standby database.
原因:
This issue was reported in Unpublished Bug 33821145.
Fixed :- 19.15.0.0.220419DBRU
解决方法:
1.Apply the patch for 33821145
2.Determine the current value of the below parameter:-
Show parameter _Readable_standby_sync_timeout;
Show parameter _readable_standby_sync_interval;
3.Set the following values for these parameters
alter system set "_readable_standby_sync_timeout"=90 scope=spfile sid='*';
4.alter system set "_readable_standby_sync_interval"=300 scope=spfile sid='*';
Restart standby for these parameters to come into effect.