>> What about hypterthreading does it still happen if HTT is turned off ?
> The problem comes from keeping the caches synchronized between multiple > physical CPUs. AFAICS enabling HTT wouldn't make it worse, because a > hyperthreaded processor still only has one cache. Also, I forgot to say that the numbers I'm quoting *are* with HTT off. regards, tom lane ---------------------------(end of broadcast)--------------------------- TIP 8: explain analyze is your friend