Re: High CPU usage / load average after upgrading to Ubuntu 12.04

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От Josh Berkus
Тема Re: High CPU usage / load average after upgrading to Ubuntu 12.04
Дата
Msg-id 51259102.9040707@agliodbs.com
обсуждение исходный текст
Ответ на High CPU usage / load average after upgrading to Ubuntu 12.04  (Dan Kogan <dan@iqtell.com>)
Ответы Re: High CPU usage / load average after upgrading to Ubuntu 12.04  (Jeff Frost <jeff@pgexperts.com>)
Re: High CPU usage / load average after upgrading to Ubuntu 12.04  (Glyn Astill <glynastill@yahoo.co.uk>)
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Дерево обсуждения 
> Sounds to me like your IO system is stalling on fsyncs or something
> like that.  On machines with plenty of IO cranking up completion
> target usuall smooths things out.

It certainly seems like it does.  However, I can't demonstrate the issue
using any simpler tool than pgbench ... even running four test_fsyncs in
parallel didn't show any issues, nor do standard FS testing tools.

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

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