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Re: Stray autovacuum daemon

From: "Mikko Partio" <mpartio(at)gmail(dot)com>
To: "Alvaro Herrera" <alvherre(at)commandprompt(dot)com>
Cc: pgsql-admin(at)postgresql(dot)org
Subject: Re: Stray autovacuum daemon
Date: 2008-02-22 18:15:31
Message-ID: 2ca799770802221015o7d4786f4v46467b379781d7c8@mail.gmail.com (view raw or flat)
Thread:
Lists: pgsql-admin
On Fri, Feb 22, 2008 at 7:01 PM, Mikko Partio <mpartio(at)gmail(dot)com> wrote:

>
>
> On Fri, Feb 22, 2008 at 5:44 PM, Alvaro Herrera <
> alvherre(at)commandprompt(dot)com> wrote:
>
> > Mikko Partio escribió:
> >
> > > Now, the problem is that I cannot turn autovacuum off! I have tried to
> > set
> > > autovacuum = off at postgresql.conf with no avail. I have also tried
> > to
> > > disable the vacuum by inserting rows to pg_autovacuum but still the
> > vacuum
> > > processes just pop up. What's even more weird is that autovacuum is
> > > vacuuming the same tables over and over. No sign of xid wraparound
> > issues
> > > show in the logs. How can I stop autovacuum without restarting the
> > database
> > > instance?
> >
> > If your database is in danger of Xid wraparound, autovacuum will run on
> > it no matter what you do.  Check pg_class.relfrozenxid and
> > pg_database.datfrozenxid, and the current Xid counter (from
> > pg_controldata I think).  Also take a look at the description of the
> > autovacuum_min_freeze_age param (or was it max_freeze_age?  I forget).
> >
>
>

I think I may have found the problem, the import uses a temporary table
which I guess autovacuum can not handle? Manually vacuuming it changed the
relfrozenxids of other tables dramatically.

Regards

Mikko

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