From: Scott Marlowe <scott.marlowe@gmail.com>
To: Alexander Staubo <alex@purefiction.net>
Cc: Damon Hart <dhcom@sundial.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: PostgreSQL performance on various distribution stock kernels
Date: Mon, 26 Nov 2007 17:06:39 -0600
Message-ID: <dcc563d10711261506h12b66f83n5f2c27e0d3a281bb@mail.gmail.com> (raw)
In-Reply-To: <88daf38c0711261500v3f0709d6k2d8d83996a7271dd@mail.gmail.com>
References: <1196117408.19996.16.camel@xw1.bbd>
<88daf38c0711261500v3f0709d6k2d8d83996a7271dd@mail.gmail.com>
On Nov 26, 2007 5:00 PM, Alexander Staubo <alex@purefiction.net> wrote:
> 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
Yeah, I wondered about that too, but thought the completely fair
scheduler was not on by default so didn't mention it. Hmmm. I
wonder.
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To: pgsql-performance@postgresql.org
Cc: scott.marlowe@gmail.com, alex@purefiction.net, dhcom@sundial.com
Subject: Re: PostgreSQL performance on various distribution stock kernels
In-Reply-To: <dcc563d10711261506h12b66f83n5f2c27e0d3a281bb@mail.gmail.com>
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