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From: Josh Berkus <josh@agliodbs.com>
To: Steve Crawford <scrawford@pinpointresearch.com>
To: Scott Marlowe <scott.marlowe@gmail.com>
Cc: Bruce Momjian <bruce@momjian.us>
Cc: pgsql-performance@postgresql.org <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: Thu, 21 Aug 2014 16:29:27 -0700
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On 08/21/2014 04:08 PM, Steve Crawford wrote:
> On 08/21/2014 03:51 PM, Josh Berkus wrote:
>> On 08/21/2014 02:26 PM, Scott Marlowe wrote:
>>> I'm running almost the exact same setup in production as a spare. It
>>> has 4 of those CPUs, 256G RAM, and is currently set to use HT. Since
>>> it's a spare node I might be able to do some testing on it as well.
>>> It's running a 3.2 kernel right now. I could probably get a later
>>> model kernel on it even.
>> You know about the IO performance issues with 3.2, yes?
>>
> Were those 3.2 only and since fixed or are there issues persisting in
> 3.2+? The 12.04 LTS release of Ubuntu Server was 3.2 but the 14.04 is 3.13.
The issues I know of were fixed in 3.9.
--
Josh Berkus
PostgreSQL Experts Inc.
http://pgexperts.com
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