linux-kernel - Huge performance regression in 2.6.23?

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Date:	Tue, 30 Oct 2007 07:16:20 -0400
From:	"Björn" <askadar@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: Huge performance regression in 2.6.23?

Have a look at slides 17, 18, and 19 of the presentation available at
http://people.freebsd.org/~kris/scaling/7.0%20Preview.pdf . It shows a
huge drop in performance for both PostgreSQL and MySQL under 2.6.23.

The slides are light on details on the exact setup, but I find it hard
to believe that such a major regression would have gone unnoticed
during testing of CFS. Maybe someone (with the appropriate hardware,
which I lack) can try to reproduce the results?

Is it really that bad?

- Bjoern
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