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From: Mel Llaguno <mllaguno@coverity.com>
To: Josh Berkus <josh@agliodbs.com>
To: Przemysław Deć <przemyslaw.dec@linuxpolska.pl>
Cc: pgsql-performance@postgresql.org <pgsql-performance@postgresql.org>
Subject: Re: Some performance testing?
Date: Wed, 8 Apr 2015 21:29:49 +0000
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Cool. Good to know. I'll see if I can replicate these results in my environment. Thanks, M.

________________________________________
From: Josh Berkus <josh@agliodbs.com>
Sent: Wednesday, April 08, 2015 1:05 PM
To: Mel Llaguno; Przemysław Deć
Cc: pgsql-performance@postgresql.org
Subject: Re: [PERFORM] Some performance testing?

On 04/07/2015 11:07 AM, Mel Llaguno wrote:
> Care to elaborate? We usually do not recommend specific kernel versions
> for our customers (who run on a variety of distributions). Thanks, M.

You should.

http://www.databasesoup.com/2014/09/why-you-need-to-avoid-linux-kernel-32.html

Performance is literally 2X to 5X different between kernels.

--
Josh Berkus
PostgreSQL Experts Inc.
http://pgexperts.com


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