Re: found xmin from before relfrozenxid on pg_catalog.pg_authid

Hi,

On 2018-06-20 15:05:59 +0300, Sergey Burladyan wrote:
> Andres Freund <andres@anarazel.de> writes:
> 
> > You should first make sure it's actually this problem - which tables are
> > holding back the xmin horizon?  After that, yes, deleting the
> > global/pg_internal.init file is the way to go, and I can't think of a
> > case where it's problematic, even without stopping the server.
> 
> Thanks for clarification! I also have this problem, BTW, autovacuum does
> not worked at all:
> # select max(last_autovacuum) from pg_stat_user_tables;
>               max
> -------------------------------
>  2018-06-06 00:48:47.813841+03
> 
> all it workers stoped with this messages:
> ERROR: found xmin 982973690 from before relfrozenxid 2702858737
> CONTEXT: automatic vacuum of table "avito_delta.pg_catalog.pg_authid"
> ERROR: found xmin 982973690 from before relfrozenxid 2702858761
> CONTEXT: automatic vacuum of table "avito_delta.pg_catalog.pg_auth_members"
> 
> and it does not try to vacuum other tables.

Yea, that's this bug.  I'd remove global/pg_internal.init, reconnect,
and manually vacuum.

Greetings,

Andres Freund