On 1/18/06, Rodrigo Barbosa rodrigob@suespammers.org wrote:
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On Wed, Jan 18, 2006 at 11:38:38AM -0800, Fong Vang wrote:
We running htis kernel: kernel-smp-2.6.9-11.EL.i686.rpm.
I have a fairly good idea what it is: context switch storm.
We have been seeing it for quite some time. Always Intel hardware, usually Xeons, but sometimes P4 HTs too. It is a known condition, even tho the bug itself is still elusive. Could be either related to the processor or the northbridge.
Are you supposed to see this abnomally when using vmstat to see context switch rate? I'm only see < 150 on these machines (but they're functioning now so maybe we just haven't trigger the abnomally?).
We are using dual Xeons.
Which kernel would you recommend? I guess we'll have to try the kernel from CentOS 4.2.
So far, the only way to stop the problem is switching to a non-smp Kernel.
Best Regards,
Rodrigo Barbosa rodrigob@suespammers.org "Quid quid Latine dictum sit, altum viditur" "Be excellent to each other ..." - Bill & Ted (Wyld Stallyns)
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