Message-ID: <509BBA87.3090400@optionshouse.com>
Date: Thu, 8 Nov 2012 07:58:31 -0600
From: Shaun Thomas <sthomas@optionshouse.com>
Reply-To: <sthomas@optionshouse.com>
Organization: Peak6
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To: David Boreham <david_list@boreham.org>
CC: <pgsql-performance@postgresql.org>
Subject: Re: HT on or off for E5-26xx ?
References: <5099D5FA.90802@boreham.org> <5099E094.9010703@catalyst.net.nz>
	<509A631F.2010507@boreham.org> <509AD0AB.5010109@catalyst.net.nz>
	<509B241C.1080108@boreham.org>
In-Reply-To: <509B241C.1080108@boreham.org>
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On 11/07/2012 09:16 PM, David Boreham wrote:

> bash-4.1$ /usr/pgsql-9.2/bin/pgbench -T 600 -j 48 -c 48

Unfortunately without -S, you're not really testing the processors. A 
regular pgbench can fluctuate a more than that due to writing and 
checkpoints.

For what it's worth, our X5675's perform about 40-50% better with HT 
enabled. Not the 2x you might expect by doubling the amount of 
"processors", but it definitely didn't make things worse.

-- 
Shaun Thomas
OptionsHouse | 141 W. Jackson Blvd. | Suite 500 | Chicago IL, 60604
312-444-8534
sthomas@optionshouse.com

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