Message-ID: <50758857.6030008@optionshouse.com>
Date: Wed, 10 Oct 2012 09:38:15 -0500
From: Shaun Thomas <sthomas@optionshouse.com>
Reply-To: <sthomas@optionshouse.com>
Organization: Peak6
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To: =?UTF-8?B?U3RyYWhpbmphIEt1c3R1ZGnEhw==?= <strahinjak@nordeus.com>
CC: <pgsql-performance@postgresql.org>
Subject: Re: shared_buffers/effective_cache_size on 96GB server
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On 10/10/2012 09:35 AM, Strahinja Kustudi=C4=87 wrote:

> #sysctl vm.dirty_ratio
> vm.dirty_ratio =3D 40
> # sysctl vm.dirty_background_ratio
> vm.dirty_background_ratio =3D 10

Ouuuuch. That looks a lot like an old RHEL or CentOS system. Change 
those ASAP. Currently your system won't start writing dirty buffers 
until it hits 9.6GB. :(

> shows that these values are even higher by default. When you said
> RAID buffer size, you meant the controllers cache memory size=3F

Yeah, that. :)

-- 
Shaun Thomas
OptionsHouse | 141 W. Jackson Blvd. | Suite 500 | Chicago IL, 60604
312-444-8534
sthomas@optionshouse.com

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