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From: Shaun Thomas <sthomas@optionshouse.com>
To: Josh Berkus <josh@agliodbs.com>
To: pgsql-performance@postgresql.org
Cc: Mark Kirkwood <mark.kirkwood@catalyst.net.nz>
Cc: Graeme B. Bell <grb@skogoglandskap.no>
Subject: Re: Turn off Hyperthreading! WAS: 60 core performance with 9.3
Date: Wed, 20 Aug 2014 15:36:05 -0500
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In-Reply-To: <53F4F36E.6050003@agliodbs.com>
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On 08/20/2014 02:13 PM, Josh Berkus wrote:

> So we're definitely back to "If you're using PostgreSQL, turn off
> Hyperthreading".

That's so strange. Back when I did my Nehalem tests, we got a very 
strong 30%+ increase by enabling HT. We only got a hit when we turned 
off turbo, or forgot to disable power saving features.

-- 
Shaun Thomas
OptionsHouse, LLC | 141 W. Jackson Blvd. | Suite 800 | Chicago IL, 60604
312-676-8870
sthomas@optionshouse.com

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