Thanks, I don’t think overheating is an issue, it’s a large dell server, and I have checked the historic CPU temperature in the servers control panel, and no overheating has shown. Zone_reclaim_mode is already set to 0 Den 31/03/2014 kl. 16.50 skrev Scott Marlowe <scott.marlowe@xxxxxxxxx>: > On Mon, Mar 31, 2014 at 8:24 AM, Niels Kristian Schjødt > <nielskristian@xxxxxxxxxxxxx> wrote: >> >> Thanks, this seems to persist after a reboot of the server though, and I have never in my server's 3 months life time experienced anything like it. > > Could it be overheating and therefore throttling the cores? > > Also another thing to look at on large memory machines with > 1 CPU > socket is zone_reclaim_mode being set to 1. Always set it to 0 on a > linux machine running postgres. -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance