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Re: Weird performance problem [message #35857 is a reply to message #35785]

Tue, 28 April 2009 11:34

maratrus
Messages: 1495
Registered: August 2007
Location: Moscow

Senior Member

Hello,

what kernel do you use?

So, the provided vmstat output show that CPU is idle.
The only thing I can assume for now is that somebody disables interrupts and thus "missed * ticks" messages appeared and network packets handling is delayed.
Do you have any assumptions?
BTW, does "service vz stop" resolve the problem or the problem takes place when vz service is stopped?

It may be useful to gather alt-sysrq-* outputs:
Alt-SysRQ-
1) "m" - for memory info dump
2) "p" - for registers - several times, please, twice the number of CPUs
3) "a" - for scheduler stat - 3 times
4) "w" - another scheduler info - 3 times
5) "t" - for all processes calltraces. Warning - this is a resource consuming operation. At least - twice.

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[Message index]

		Weird performance problem By: ugob on Wed, 22 April 2009 12:27
		Re: Weird performance problem By: maratrus on Tue, 28 April 2009 11:34
		Re: Weird performance problem By: ugob on Tue, 28 April 2009 12:53
		Re: Weird performance problem By: ugob on Tue, 28 April 2009 12:55

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