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Re: slow query

From: Clarence Gardner <clarence(at)silcom(dot)com>
To: Robert Treat <xzilla(at)users(dot)sourceforge(dot)net>
Cc: Oleg Lebedev <oleg(dot)lebedev(at)waterford(dot)org>,Josh Berkus <josh(at)agliodbs(dot)com>,"pgsql-performance(at)postgresql(dot)org" <pgsql-performance(at)postgresql(dot)org>
Subject: Re: slow query
Date: 2003-02-24 17:27:56
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-performance
On 24 Feb 2003, Robert Treat wrote:

> If your seeing wildly dramatic improvments from vacuum full, you might
> want to look into running regular vacuums more often (especially for
> high turnover tables), increase your max_fsm_relations to 1000, and
> increasing your max_fsm_pages. 

I don't know about the settings you mention, but a frequent vacuum
does not at all obviate a vacuum full. My database is vacuumed every
night, but a while ago I found that a vacuum full changed a simple
single-table query from well over 30 seconds to one or two. We now
do a vacuum full every night.

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