Subject: Re: 2.4.23aa2 (bugfixes and important VM improvements for the high
	end)
From: Peter Zaitsev <peter@mysql.com>
To: Andrea Arcangeli <andrea@suse.de>
Cc: Rik van Riel <riel@redhat.com>, "Martin J. Bligh" <mbligh@aracnet.com>,
       Andrew Morton <akpm@osdl.org>, linux-kernel@vger.kernel.org
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	 <Pine.LNX.4.44.0402280950500.1747-100000@chimarrao.boston.redhat.com>
	 <20040229014357.GW8834@dualathlon.random>
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Organization: MySQL
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Date: Wed, 03 Mar 2004 19:14:34 -0800
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On Sat, 2004-02-28 at 17:43, Andrea Arcangeli wrote:

> > 
> > Definately not what we expected, but a nice surprise nontheless.
> 
> this is the first time I hear something like this. Maybe you mean the
> 4:4 was actually using more ram for the SGA? Just curious.

I actually recently Did MySQL benchmarks using DBT2 MySQL port.

The test box was  4Way Xeon w HT,  4Gb RAM,  8 SATA Disks in RAID10.

I used RH AS 3.0 for tests (2.4.21-9.ELxxx)

For Disk Bound workloads (200 Warehouse) I got 1250TPM for "hugemem" vs
1450TPM for "smp" kernel, which is some 14% slowdown.

For CPU bound load (10 Warehouses) I got 7000TPM instead of 4500TPM,
which is over 35% slowdown.


-- 
Peter Zaitsev, Senior Support Engineer
MySQL AB, www.mysql.com

Meet the MySQL Team at User Conference 2004! (April 14-16, Orlando,FL)
  http://www.mysql.com/uc2004/

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