Re: error in vacuum

On 2018-09-01 19:02:18 -0700, Dave Peticolas wrote:
> On Sat, Sep 1, 2018 at 6:56 PM Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>
> > Dave Peticolas <dave(at)krondo(dot)com> writes:
> > >>> I'm seeing this error on a table repeatedly:
> > >>> found update xid 3433096759 <(343)%20309-6759> from before
> > relfrozenxid 3498422955
> >
> > >> This is a primary, 9.6.8 to be exact.
> >
> > This message is known to be associated with several data-corruption bugs
> > we've fixed recently. You should update to current (9.6.10) sooner not
> > later. I don't think that will cure existing corruption for you, but
> > it should prevent things from getting worse.
> >
>
> Ok, thank you for that information I will do so. The dump/truncate/restore
> I mentioned in a later post seems to fix the corruption in a restored DB.
> Given the nature of the bug do you think that would fix that table?

Yes, it's fairly likely that it does. You might even get around it by
just doing a no-op update of the whole table. Nevertheless you need to
upgrade, or more of that corruption can occur.

Greetings,

Andres Freund