From: Simon Riggs <simon@2ndquadrant.com>
To: Guillaume Smet <guillaume.smet@gmail.com>
Cc: pgsql-performance <pgsql-performance@postgresql.org>
Cc: Stefan Kaltenbrunner <stefan@kaltenbrunner.cc>
Subject: Re: More shared buffers causes lower performances
Date: Wed, 26 Dec 2007 11:21:05 +0000
Message-ID: <1198668065.4221.288.camel@ebony.site> (raw)
In-Reply-To: <1d4e0c10712251606q6f9503deye3da4b68c51bf5e@mail.gmail.com>
References: <1d4e0c10712251606q6f9503deye3da4b68c51bf5e@mail.gmail.com>
On Wed, 2007-12-26 at 01:06 +0100, Guillaume Smet wrote:
> I lowered the number of concurrent clients to 50 because 100 is quite
> high and I obtain the same sort of results:
> shared_buffers=32MB: 1869 tps
> shared_buffers=64MB: 1844 tps
> shared_buffers=512MB: 1676 tps
> shared_buffers=1024MB: 1559 tps
Can you try with
bgwriter_lru_maxpages = 0
So we can see if the bgwriter has any hand in this?
--
Simon Riggs
2ndQuadrant http://www.2ndQuadrant.com
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To: pgsql-performance@postgresql.org
Cc: simon@2ndquadrant.com, guillaume.smet@gmail.com, stefan@kaltenbrunner.cc
Subject: Re: More shared buffers causes lower performances
In-Reply-To: <1198668065.4221.288.camel@ebony.site>
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