From: Alexander Staubo <alex@purefiction.net>
To: Damon Hart <dhcom@sundial.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: PostgreSQL performance on various distribution stock kernels
Date: Tue, 27 Nov 2007 00:00:20 +0100
Message-ID: <88daf38c0711261500v3f0709d6k2d8d83996a7271dd@mail.gmail.com> (raw)
In-Reply-To: <1196117408.19996.16.camel@xw1.bbd>
References: <1196117408.19996.16.camel@xw1.bbd>
On 11/26/07, Damon Hart <dhcom@sundial.com> wrote:
> So, what's different between these tests? I'm seeing performance
> differences of between +65% to +90% transactions per second of the
> OpenVZ kernel running on the HN over the stock Fedora 8 kernel. Is
> this reflective of different emphasis between RHEL and Fedora kernel
> builds? Some OpenVZ optimization on top of the RHEL5 build? Something
> else? Where should I look?
A recent FreeBSD benchmark (which also tested Linux performance) found
major performance differences between recent versions of the kernel,
possibly attributable to the new so-called completely fair scheduler:
http://archives.postgresql.org/pgsql-performance/2007-11/msg00132.php
No idea if it's relevant.
Alexander.
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To: pgsql-performance@postgresql.org
Cc: alex@purefiction.net, dhcom@sundial.com
Subject: Re: PostgreSQL performance on various distribution stock kernels
In-Reply-To: <88daf38c0711261500v3f0709d6k2d8d83996a7271dd@mail.gmail.com>
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