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Re: Auto-Vacuum in 8.1 was ineffective for me. 8.2 may work better?

From: Alvaro Herrera <alvherre(at)commandprompt(dot)com>
To: Mark Stosberg <mark(at)summersault(dot)com>
Cc: pgsql-performance(at)postgresql(dot)org
Subject: Re: Auto-Vacuum in 8.1 was ineffective for me. 8.2 may work better?
Date: 2007-02-21 18:55:44
Message-ID: 20070221185544.GX25424@alvh.no-ip.org (view raw or flat)
Thread:
Lists: pgsql-performance
Mark Stosberg wrote:
> 
> When I upgraded a busy database system to PostgreSQL 8.1, I was excited
> about AutoVacuum, and promptly enabled it, and turned off the daily
> vacuum process.
> 
> (
> I set the following, as well as the option to enable auto vacuuming
> stats_start_collector = true
> stats_row_level = true
> )
> 
> I could see in the logs that related activity was happening, but within
> a few days, the performance became horrible, and enabling the regular
> vacuum fixed it.
> 
> Eventually autovacuum was completely disabled.

This has been tracked down to a bug in 8.1's Windows port.  See
http://people.planetpostgresql.org/mha/index.php?/archives/134-8.1-on-win32-pgstat-and-autovacuum.html

-- 
Alvaro Herrera                                http://www.CommandPrompt.com/
PostgreSQL Replication, Consulting, Custom Development, 24x7 support

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