From: Jim C. Nasby <jnasby@pervasive.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Antoine <melser.anton@gmail.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: vacuuming problems continued
Date: Mon, 5 Jun 2006 09:43:49 -0500
Message-ID: <20060605144349.GQ53487@pervasive.com> (raw)
In-Reply-To: <12384.1149174355@sss.pgh.pa.us>
References: <92d3a4950606010454y67293765o56001e8996975b45@mail.gmail.com>
<12384.1149174355@sss.pgh.pa.us>
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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To: pgsql-performance@postgresql.org
Cc: jnasby@pervasive.com, tgl@sss.pgh.pa.us, melser.anton@gmail.com
Subject: Re: vacuuming problems continued
In-Reply-To: <20060605144349.GQ53487@pervasive.com>
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