9.0 performance degradation with kernel 3.11

From: Filip Rembiałkowski <filip(dot)rembialkowski(at)gmail(dot)com>
To: pgsql-performance(at)postgresql(dot)org
Subject: 9.0 performance degradation with kernel 3.11
Date: 2014-11-13 08:10:23
Message-ID: CAP_rwwnds6tgUT33uei4C0bn+VChWXVb1Z9Rgi+7M-CP4SSEEA@mail.gmail.com
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Hi

After upgrading our 9.0 database server

from:
openSUSE 11.4, kernel 2.6.37.6-24-default, Pg 9.0.13

to:
openSUSE 13.1, kernel v 3.11.10-21-default, Pg 9.0.15

... and overall server load is +1 after that.

We did not add any new services/daemons.

It's hard to track down to individual queries - when I tested most
individual query times are same as before the migration.

Any - ANY - hints will be much appreciated.

Thanks
Filip

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