Re: We really ought to do something about O_DIRECT and data=journalled on ext4

From: Steve Singer <ssinger(at)ca(dot)afilias(dot)info>
To: Greg Smith <greg(at)2ndquadrant(dot)com>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Josh Berkus <josh(at)agliodbs(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: We really ought to do something about O_DIRECT and data=journalled on ext4
Date: 2010-12-07 00:43:15
Message-ID: 4CFD8323.6030204@ca.afilias.info
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On 10-12-06 06:56 PM, Greg Smith wrote:
> Tom Lane wrote:
>> The various testing that's been reported so far is all for
>> Linux and thus doesn't directly address the question of whether other
>> kernels will have similar performance properties.
>
> Survey of some popular platforms:
>

<snip>

> So my guess is that some small percentage of Windows users might notice
> a change here, and some testing on FreeBSD would be useful too. That's
> about it for platforms that I think anybody needs to worry about.

If you tell me which options to pgbench and which .conf file settings
you'd like to see I can probably arrange to run some tests on AIX.

>
> --
> Greg Smith 2ndQuadrant USgreg(at)2ndQuadrant(dot)com Baltimore, MD
> PostgreSQL Training, Services and Supportwww.2ndQuadrant.us
> "PostgreSQL 9.0 High Performance":http://www.2ndQuadrant.com/books
>

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