Glyn Astill <glynast...@yahoo.co.uk> 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. -Kevin
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