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

From: Josh Berkus <josh(at)agliodbs(dot)com>
To: Jon Nelson <jnelson+pgsql(at)jamponi(dot)net>
Cc: Scott Marlowe <scott(dot)marlowe(at)gmail(dot)com>, postgres performance list <pgsql-performance(at)postgresql(dot)org>
Subject: Re: High CPU usage / load average after upgrading to Ubuntu 12.04
Date: 2013-02-19 00:51:50
Message-ID: 5122CCA6.7070904@agliodbs.com
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> Did you try turning barriers on or off *manually* (explicitly)? With
> LSI and barriers *on* and ext4 I had less-optimal performance. With
> Linux MD or (some) 3Ware configurations I had no performance hit.

They're off in fstab.

/dev/sdd1 on /data type xfs (rw,noatime,nodiratime,nobarrier)

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

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