From: Joost Kraaijeveld <J.Kraaijeveld@Askesis.nl>
To: PFC <lists@peufeu.com>
Cc: postgresql performance list <pgsql-performance@postgresql.org>
Subject: Re: Vacuum takes forever
Date: Tue, 29 May 2007 19:56:07 +0200
Message-ID: <1180461367.18930.25.camel@panoramix> (raw)
In-Reply-To: <op.ts3l93nqcigqcu@apollo13>
References: <1180458223.18930.16.camel@panoramix>
<op.ts3l93nqcigqcu@apollo13>
On Tue, 2007-05-29 at 19:16 +0200, PFC wrote:
>
> > Could this be because of my Cost-Based Vacuum Delay settings ?
>
> Yeah. It is supposed to slow down VACUUM so it doesn't kill your server,
> but it is not aware of the load. It will also slow it down if there is no
> load. That is its purpose after all ;)
> If you want fast vacuum, issue SET vacuum_cost_delay = 0; before.
Thanks, I tried it and it worked. I did not know that changing this
setting would result in such a performance drop ( I just followed an
advise I read on http://www.powerpostgresql.com/PerfList/) which
mentioned a tripling of the the execution time. Not a change from
8201819 ms to 17729 ms.
--
Groeten,
Joost Kraaijeveld
Askesis B.V.
Molukkenstraat 14
6524NB Nijmegen
tel: 024-3888063 / 06-51855277
fax: 024-3608416
web: www.askesis.nl
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To: pgsql-performance@postgresql.org
Cc: J.Kraaijeveld@Askesis.nl, lists@peufeu.com
Subject: Re: Vacuum takes forever
In-Reply-To: <1180461367.18930.25.camel@panoramix>
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