Re: pg_rewind after promote

On Thu, 2024-03-28 at 17:17 +0100, Emond Papegaaij wrote:
> Op do 28 mrt 2024 om 16:21 schreef Laurenz Albe <laurenz(dot)albe(at)cybertec(dot)at>:
> > On Thu, 2024-03-28 at 15:52 +0100, Emond Papegaaij wrote:
> > > pg_rewind: source and target cluster are on the same timeline pg_rewind: no rewind required
> > >
> > > If we ignore the response from pg_rewind, streaming will break on the node that reported
> > > no rewind was required. On the new primary, we do observe the database moving from timeline
> > > 21 to 22, but it seems this takes some time to materialize to be observable by pg_rewind.
> >
> > This must be the problem addressed by commit 009eeee746 [1]. 
> >
> > A temporary workaround could be to explicitly trigger a checkpoint right after
> > promotion.
>
> Would this be as simple as sending a CHECKPOINT to the new primary just after promoting?
> This would work fine for us until we've migrated to v16.

Yes, that would be the idea.

Yours,
Laurenz Albe