From: Tom Lane <tgl@sss.pgh.pa.us>
To: Robert Creager <Robert_Creager@LogicalChaos.org>
Cc: Matthew T. O'Connor <matthew@zeut.net>
Cc: PGPerformance <pgsql-performance@postgresql.org>
Subject: Re: Huge performance problem between 7.4.1 and 8.0.3 - CS
Date: Mon, 18 Jul 2005 00:18:30 -0400
Message-ID: <24616.1121660310@sss.pgh.pa.us> (raw)
In-Reply-To: <20050717221050.7c4ac241@thunder.logicalchaos.org>
References: <20050717213416.59dcb52e@thunder.logicalchaos.org>
<42DB2684.9020706@zeut.net>
<20050717221050.7c4ac241@thunder.logicalchaos.org>
Robert Creager <Robert_Creager@LogicalChaos.org> writes:
> I am, and it is. It's ANALYZING and VACUUM'ing tables every interval (5 mi=
> nutes
> - 8.0.3). Right now, for that last 4 hours, I'm not VACUUMing the 7.4.1
> database and it's still clicking along at < .2 second queries.
Have you compared physical table sizes? If the autovac daemon did let
things get out of hand, you'd need a VACUUM FULL or CLUSTER or TRUNCATE
to get the table size back down --- plain VACUUM is unlikely to fix it.
regards, tom lane
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To: pgsql-performance@postgresql.org
Cc: tgl@sss.pgh.pa.us, Robert_Creager@LogicalChaos.org, matthew@zeut.net
Subject: Re: Huge performance problem between 7.4.1 and 8.0.3 - CS
In-Reply-To: <24616.1121660310@sss.pgh.pa.us>
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