To: "Evan Carroll" <lists@evancarroll.com>
Cc: <pgsql-performance@postgresql.org>
Subject: Re: 8.2 Query 10 times slower than 8.1 (view-heavy)
In-Reply-To: <428b865e0708280822u522391ecr5366bb5a6647f1aa@mail.gmail.com>
	(Evan Carroll's message of "Tue\, 28 Aug 2007 10\:22\:11 -0500")
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References: <428b865e0708280822u522391ecr5366bb5a6647f1aa@mail.gmail.com>
From: Gregory Stark <stark@enterprisedb.com>
Organization: EnterpriseDB
Date: Tue, 28 Aug 2007 16:58:12 +0100
Message-ID: <87k5rfslbf.fsf@oxford.xeocode.com>
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"Evan Carroll" <lists@evancarroll.com> writes:

"Evan Carroll" <lists@evancarroll.com> writes:

> Dearest dragon hunters and mortal wanna-bes,
>
> I recently upgraded a system from Apache2/mod_perl2 to
> Lighttpd/fastcgi. The upgrade went about as rough as can be. While in
> the midst of a bad day, I decided to make it worse, and upgrade Pg 8.1
> to 8.2. Most people I talk to seem to think 8.1 was a lemon release;
> not I. It worked excellent for me for the longest time, and I had no
> good reason to upgrade it, other than to just have done so. 

I assume you mean 8.1.9 and 8.2.4? 

> The following material is provided for your assisting-me-pleasure: the
> original SQL; the \ds for all pertinent views and tables; the output
> of Explain Analyze; and the original query.

While I do in fact enjoy analyzing query plans I have to say that 75-line
plans push the bounds of my assisting-you-pleasure. Have you experimented with
simplifying this query?

-- 
  Gregory Stark
  EnterpriseDB          http://www.enterprisedb.com