Re: found xmin from before relfrozenxid on pg_catalog.pg_authid

On 2018-05-24 17:13:11 -0400, Alvaro Herrera wrote:
> On 2018-May-24, Andres Freund wrote:
> 
> > On 2018-05-24 16:49:40 -0400, Alvaro Herrera wrote:
> > > BTW is it just a coincidence or are all the affected tables pg_authid?
> > > Maybe the problem is shared relations ..?  Maybe the fact that they have
> > > separate relfrozenxid (!?) in different databases?
> > 
> > Yes, that appears to be part of the problem. I've looked at a number of
> > shared relation related codepaths, but so far my theory is that the
> > relcache is wrong. Note that one of the reports in this thread clearly
> > had a different relcache relfrozenxid than in the catalog.
> 
> Hmm ... is that because they read the values on different databases?
> Are you referring to the reports by Maxim Boguk?  I see one value from
> template1, another value from template0.

I was referring to
https://www.postgresql.org/message-id/20180522193007.4bi5oluqb7c72oq2@alap3.anarazel.de
but you're right, it's possible that that's just caused by time passing
or different databases.

Greetings,

Andres Freund