Re: Performance increase with elevator=deadline

From: "Albe Laurenz" <laurenz(dot)albe(at)wien(dot)gv(dot)at>
To: "Gregory Stark *EXTERN*" <stark(at)enterprisedb(dot)com>
Cc: <pgsql-performance(at)postgresql(dot)org>
Subject: Re: Performance increase with elevator=deadline
Date: 2008-04-16 05:27:14
Message-ID: D960CB61B694CF459DCFB4B0128514C22D6E7A@exadv11.host.magwien.gv.at
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Gregory Stark wrote:
>> After some time of trial and error we found that changing the I/O scheduling
>> algorithm to "deadline" improved I/O performance by a factor 4 (!) for
>> this specific load test.
>
> What was the algorithm before?

The default algorithm, CFQ I think it is.

Yours,
Laurenz Albe

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