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.
Either use
pg_ctl promote -D /path/to/datadir
on the command line or
SELECT pg_promote();
in SQL.
Yours,
Laurenz Albe