Re: [HACKERS] make async slave to wait for lsn to be replayed

On Tue, Aug 6, 2024 at 8:36 AM Michael Paquier <michael@paquier.xyz> wrote:
> On Tue, Aug 06, 2024 at 05:17:10AM +0300, Alexander Korotkov wrote:
> > The 0001 patch is intended to improve this situation.  Actually, it's
> > not right to just put RecoveryInProgress() after
> > GetXLogReplayRecPtr(), because more wal could be replayed between
> > these calls.  Instead we need to recheck GetXLogReplayRecPtr() after
> > getting negative result of RecoveryInProgress() because WAL replay
> > position couldn't get updated after.
> > 0002 patch comprises fix for the header comment of WaitLSNSetLatches() function
> > 0003 patch comprises tests for pg_wal_replay_wait() errors.
>
> Before adding more tests, could it be possible to stabilize what's in
> the tree?  drongo has reported one failure with the recovery test
> 043_wal_replay_wait.pl introduced recently by 3c5db1d6b016:
> https://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=drongo&dt=2024-08-05%2004%3A24%3A54

Thank you for pointing!
Surely, I'll fix this before.

------
Regards,
Alexander Korotkov
Supabase