On Thu, 2024-02-08 at 09:23 +0100, Alpaslan AKDAĞ wrote: > Thank you for your answer. > > I have checked the pg_is_in_recovery() and here are the results > from primary and hot stand by server. > > Primary (old standby ): > select pg_is_in_recovery(); > pg_is_in_recovery > ------------------- > f > (1 row) > > hot standby(old primary): > select pg_is_in_recovery(); > pg_is_in_recovery > ------------------- > t > (1 row) > and there is also standby.signal file in standby server. > So it seems that there is nothing wrong. > > recovery_min_apply_delay = '2d' are set in warm standby servers. > Before the switchover we had the same settings but we did not have this problem.
It is becoming increasingly obvious that you never actually performed a switchover: it seems that you didn't promote the standby.