Dave Cramer <[EMAIL PROTECTED]> writes: > So the the kernel/OS is irrelevant here ? this happens on any dual xeon?
I believe so. The context-switch behavior might possibly be a little more pleasant on other kernels, but the underlying spinlock problem is not dependent on the kernel. > 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. regards, tom lane ---------------------------(end of broadcast)--------------------------- TIP 7: don't forget to increase your free space map settings