Re: Autovacuum or manual vacuum to recover from XID wraparound?

Update: autovacuum completed without any failures.

Regards,
Vineet

On Fri, Jun 11, 2021 at 8:35 PM Vineet Naik <naikvin(at)gmail(dot)com> wrote:
>
> On Fri, Jun 11, 2021 at 7:55 PM Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> >
> > [...]
> >
> > If you can afford to wait, it'd be interesting to see what happens.
>
> It's been running for a few days now and heap_blks_vacuumed /
> heal_blks_total is around 74% at present. If it continues at the
> current rate, we will most probably let it complete. In any case, we
> will keep it running over the weekend at least.
>
> > Looking at the code, it looks to me like what's probably happening is
> > that those errors are coming from auto-analyze attempting to update
> > pg_statistic. That should not, however, prevent auto-vacuum from
> > cleaning things up and advancing the transaction threshold limit,
> > because the catalog updates that are needed for that are nontransactional
> > and so don't need to consume XIDs.
> >
> > I wonder whether we should disable auto-analyze once we get into
> > vacuum-for-wraparound mode. But in any case, it'd be useful to
> > see whether there's an actual bug in there.
> >
> > It'd also be useful to know exactly which PG version you are running.
>
> PG version 9.6.22. Missed mentioning it earlier, sorry about that.
>
> >
> > regards, tom lane
>
> Thanks,
> Vineet

--
~ Vineet