From: "Dave Dutcher" <dave@tridecap.com>
To: =?iso-8859-1?Q?'Pi=F1eiro'?= <apinheiro@igalia.com>
Cc: "'PSQL-Performance'" <pgsql-performance@postgresql.org>
Subject: Re: [Fwd: Re: Performance problem with Sarge compared
Date: Tue, 12 Sep 2006 14:05:35 -0500
Message-ID: <006301c6d69e$6d942500$8300a8c0@tridecap.com>
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> From: pgsql-performance-owner@postgresql.org=20
> [mailto:pgsql-performance-owner@postgresql.org] On Behalf Of Pi=F1eiro
> > TIP 6: explain analyze is your friend
> Well, yes, it is a friend, but as the select at postgre Sarge version
> never finished I can't use a explain analyze. I show you the explain,
> with the hope that someone has any idea, but i think that=20
> this is almost
> indecipherable (if you want the Woody ones i can post the explain
> analyze). Thanks in advance.

Does the machine run out of disk space every time?  Is it possible to =
try
the query on a different machine with more hard drive room?  An explain
analyze of the slow plan will be much more helpful than an explain, even =
if
its from a different machine.  If its generating a large temp file, it =
is
another sign that the query is doing some kind of large cross product. =20