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Have a look in the postgres performance mailing lists. There's been
a lot of chatter recently about performance problems regarding 3.x
kernels.<br>
<br>
Will<br>
<br>
<div class="moz-cite-prefix">On 27/03/13 15:24, Quentin Hartman
wrote:<br>
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cite="mid:CAJ48qNbwMWeZ5a4ONQcFqx2yuGGhU3X+OxyHX306cLSWV1zL0g@mail.gmail.com"
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<div class="gmail_quote">On Wed, Mar 27, 2013 at 9:15 AM, Lonni J
Friedman <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:netllama@gmail.com" target="_blank">netllama@gmail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
FWIW, I also see roughly the same behavior, although my
environment is<br>
somewhat different than yours. Previously my pgpool server
was<br>
running on RHEL6, however it was migrated to Fedora17 (without<br>
changing the pgpool version). Before the migration the load
on the<br>
server was typically less than 1.00. Since migrating the load
average<br>
is 30+ (with spikes up to 60 quite often). Yet there's
nothing<br>
obvious causing the load. I'm certain something in pgpool is
causing<br>
this behavior, because the load drops to 0 during the rare
times when<br>
we need to stop pgpool for maintenance.<br>
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<br>
Thanks for the quick reply Lonni. I'm glad to hear that it's not a
problem limited to Ubuntu. Like you I suspect it has something to
do with the 3.x kernel series. I'm going to be doing some
experimentation soon to try to isolate and eliminate this problem.
I'll update this thread with my findings.<br>
<br>
If anyone else is interested in coordinating efforts, I'd be glad
for the help.<br>
<br>
QH<br>
<br>
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