Re: vacuuming problems continued - Mailing list pgsql-performance

From Jim C. Nasby
Subject Re: vacuuming problems continued
Date
Msg-id 20060605144349.GQ53487@pervasive.com
Whole thread Raw
In response to Re: vacuuming problems continued  (Tom Lane <tgl@sss.pgh.pa.us>)
List pgsql-performance
On Thu, Jun 01, 2006 at 11:05:55AM -0400, Tom Lane wrote:
> Antoine <melser.anton@gmail.com> writes:
> > We just don't seem to be getting much benefit from autovacuum. Running
> > a manual vacuum seems to still be doing a LOT, which suggests to me
> > that I should either run a cron job and disable autovacuum, or just
> > run a cron job on top of autovacuum.
>
> The default autovac parameters are very unaggressive --- have you
> experimented with changing them?  Do you have the FSM set large enough?

Do any of the tables have a high 'churn rate' (a lot of updates) but are
supposed to be small? In cases like that autovacuum may not be enough.
--
Jim C. Nasby, Sr. Engineering Consultant      jnasby@pervasive.com
Pervasive Software      http://pervasive.com    work: 512-231-6117
vcard: http://jim.nasby.net/pervasive.vcf       cell: 512-569-9461

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