From: Tom Lane <tgl@sss.pgh.pa.us>
To: dwinner-lists@att.net
Cc: pgsql-performance@postgresql.org
Subject: Re: slow queries after ANALYZE
Date: Fri, 11 Nov 2005 16:25:52 -0500
Message-ID: <21669.1131744352@sss.pgh.pa.us> (raw)
In-Reply-To: <43750390.3090707@att.net>
References: <4374EDF1.5010709@att.net>
<21006.1131737530@sss.pgh.pa.us>
<43750390.3090707@att.net>
DW <dwinner-lists@att.net> writes:
> In the meantime, again I'm new to this -- I got pg_stats; which rows are
> the relevent ones?
The ones for columns that are mentioned in the problem query.
I don't think you need to worry about columns used only in the SELECT
output list, but anything used in WHERE, GROUP BY, etc is interesting.
> Also, I am running postgresql-server-7.4.9 from FreeBSD port (with
> optimized CFLAGS turned on during compiling)
> OS: FreeBSD 5.4 p8
The hardware environment (particularly disks/filesystems) is relevant
too.
regards, tom lane
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To: pgsql-performance@postgresql.org
Cc: tgl@sss.pgh.pa.us, dwinner-lists@att.net
Subject: Re: slow queries after ANALYZE
In-Reply-To: <21669.1131744352@sss.pgh.pa.us>
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