记录Physical Standby Switchover_status 状态 Not Allowed

原文链接： https://heliosguneserol.com/2016/02/24/physical-standby-switchover_status-showing-not-allowed/

We check the synchronization status between primary and physical standby. They are no gap and any issues on sync. Physical standby has applied the lastly generated archived redo log sequence. But We still keep to get same result from query… v$database switchover_status shows “not allowed”

While We make search at metalink We found this note: Physical Standby Switchover_status Showing Not Allowed. (Doc ID 1392763.1)
From note:
It is expected to see this status in physical standby.When we are certain that Primary and target standby are in sync,We can then proceed with switchover exercise regardless of “not allowed” status in Physical stand

Switchover always originates from Primary database. On the request of switchover sql statement “alter database commit to switchover to physical standby with session shutdown”, Primary will generate special marker called EOR (end-of-redo) that is placed in the header of online redo log sequence. So this online redo log sequence will be archived locally and sent to all standby databases.

Only upon receiving and applying EOR (end-of-redo), v$database.switchover_status will change from “not allowed” to “to primary” or “sessions active”.

So this is expected value for $database.switchover_status cloumn. We keep going switchover test and it goes so smooth.