[pgpool-general: 1654] Re: Mysterious Load Spikes
qhartman at direwolfdigital.com
Mon Apr 22 23:37:49 JST 2013
Seems like a good idea. Had it been there it would have saved me a couple
days of fruitless firedrills.
The problem isn't completely solved, I'm still seeing brief spikes of one
minute load to as high as 7 or 8 (on a dual core machine) on kernel 3.2.
It's not the constant, chronic load it was on the 3.0 kernel though, so
that's something. For reference, under the same user load running a 2.6
series kernel, these boxes never registered a load average higher than 0.5.
On Sat, Apr 20, 2013 at 3:21 AM, Tatsuo Ishii <ishii at sraoss.co.jp> wrote:
> > So I was able to upgrade the kernel on my PGPool2 boxes yesterday from
> > to 3.2, the current shipping kernel for ubuntu 12.04.2 . Interestingly
> > measured cpu utilization has increased by about 100% (still only a 3-5%
> > though in absolute terms) and the measured load average numbers have
> > dropped by about half. It's early yet to say for certain that this is
> > resolved, but it's certainly looking much better. Based on this I would
> > recommend that anyone deploying PGPool2 avoid 3.0.x revisions of the
> Thanks for the information. Maybe we should add this to FAQ?
> Tatsuo Ishii
> SRA OSS, Inc. Japan
> English: http://www.sraoss.co.jp/index_en.php
> Japanese: http://www.sraoss.co.jp
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