Date: Wed, 3 Mar 2004 19:33:43 -0800
From: Andrew Morton <akpm@osdl.org>
To: Peter Zaitsev <peter@mysql.com>
Cc: andrea@suse.de, riel@redhat.com, mbligh@aracnet.com,
       linux-kernel@vger.kernel.org
Subject: Re: 2.4.23aa2 (bugfixes and important VM improvements for the high
 end)
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Peter Zaitsev <peter@mysql.com> wrote:
>
> 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.

Please define these terms.  What is the difference between "hugemem" and
"smp"?

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

Well no, it is a 56% speedup.   Please clarify.  Lots.

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