Re: Help tuning autovacuum - seeing lots of relationbloat

On Wed, 2006-06-21 at 18:39, jody brownell wrote:
> that is exactly what I am seeing, one process, no change, always in idle while the others are constantly
> changing their state.
>
> looks like someone opened a tx then is blocking on a queue lock or something. dang.

Don't forget to check the statistics collector settings (see below), if
that is not correct then autovacuum is indeed not working correctly... I
should have put that on the beginning of the mail so you won't overlook
it ;-)

> >
> > Oh, just occured to me... in order to use autovacuum you also need to
> > enable the statistics collector on row level:
> >
> > stats_start_collector = on
> > stats_row_level = on
> >
> > See also:
> > http://www.postgresql.org/docs/8.1/static/maintenance.html#AUTOVACUUM
> >
> > This was not mentioned in the settings in your original post, so I guess
> > you didn't touch that, and I think they are disabled by default.
> >
> > If this is disabled, you should enable it and "pg_ctl reload ....", that
> > should fix the problem.
> >
> > Cheers,
> > Csaba.