Subject: Re: 2.4.23aa2 (bugfixes and important VM improvements for the high
	end)
From: Peter Zaitsev <peter@mysql.com>
To: Andrew Morton <akpm@osdl.org>
Cc: andrea@suse.de, riel@redhat.com, mbligh@aracnet.com,
       linux-kernel@vger.kernel.org
In-Reply-To: <20040303193343.52226603.akpm@osdl.org>
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Organization: MySQL
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Date: Wed, 03 Mar 2004 19:44:38 -0800
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On Wed, 2004-03-03 at 19:33, Andrew Morton wrote:


> > 
> > 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"?

Andrew,


Sorry if I was unclear.  These are suffexes from RH AS 3.0 kernel
namings.  "SMP" corresponds to normal SMP kernel they have,  "hugemem"
is kernel with 4G/4G split.

> 
> > 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.

Huh. The numbers shall be other way around of course :)   "smp" kernel
had better performance of some 7000TPM, compared to  4500TPM with
HugeMem kernel. 

Swap was disable in both cases. 


-- 
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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