On Mon, 11 Apr 2011 13:09:15 -0500, "Kevin Grittner" <Kevin.Grittner@xxxxxxxxxxxx> wrote: > Glyn Astill <glynastill@xxxxxxxxxxx> wrote: > >> The new server uses 4 x 8 core Xeon X7550 CPUs at 2Ghz > > Which has hyperthreading. > >> our current servers are 2 x 4 core Xeon E5320 CPUs at 2Ghz. > > Which doesn't have hyperthreading. > > PostgreSQL often performs worse with hyperthreading than without. > Have you turned HT off on your new machine? If not, I would start > there. And then make sure you aren't running CFQ. JD > > -Kevin -- PostgreSQL - XMPP: jdrake(at)jabber(dot)postgresql(dot)org Consulting, Development, Support, Training 503-667-4564 - http://www.commandprompt.com/ The PostgreSQL Company, serving since 1997 -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
