| From: | "Alexander Staubo" <alex(at)purefiction(dot)net> |
|---|---|
| To: | "Damon Hart" <dhcom(at)sundial(dot)com> |
| Cc: | pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: PostgreSQL performance on various distribution stock kernels |
| Date: | 2007-11-26 23:00:20 |
| Message-ID: | 88daf38c0711261500v3f0709d6k2d8d83996a7271dd@mail.gmail.com |
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| Lists: | pgsql-performance |
On 11/26/07, Damon Hart <dhcom(at)sundial(dot)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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