On 04/11/2011 02:32 PM, Scott Marlowe wrote:
Anyone know the reason for that?On Mon, Apr 11, 2011 at 12:12 PM, Joshua D. Drake <jd@xxxxxxxxxxxxxxxxx> wrote: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 2GhzWhich 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. JDThis++ Also if you're running a good hardware RAID controller, jsut go to NOOP --
Stephen Clark NetWolves Sr. Software Engineer III Phone: 813-579-3200 Fax: 813-882-0209 Email: steve.clark@xxxxxxxxxxxxx http://www.netwolves.com |
