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Need help with CPU shortage [message #36414]

Wed, 17 June 2009 09:08

dvazart
Messages: 37
Registered: October 2008
Location: France

Member

Hi !

I'm running a 2.6.18-14-ovz-686-enterprise kernel under Debian Etch. I have about 150 VEs running in 2 quad core Intel Xeon prosessors.

My problem is that the processors reach 100% for several minutes and very random, with htop i can see that is the kernel which saturates the CPU (CPU utilization by the kernel is marked in red):

http://lh6.ggpht.com/_8Lj7RDSnhB4/Sjiqwz3umYI/AAAAAAAAEdg/LF5M5MEeumM/s144/openvz-100cpu.png

http://picasaweb.google.com/lh/photo/9npqR8JyIvoXy4r2z-4Adw? feat=directlink

I also graph the CPU utilization with Munin, but the only value that reaches 100% is the iowait:

http://lh4.ggpht.com/_8Lj7RDSnhB4/Sjiv49d0pKI/AAAAAAAAEdk/aAbCnaSNc-Y/s144/munin-iowait.png

http://picasaweb.google.com/lh/photo/jUNQXmiO0x7JMkxJSLUv6w? feat=directlink

I have tried to reduce the VE's parameters to:

CPUUNITS="2000"
CPULIMIT="2"
CPUS="1"

... But still happening!

I really need help with this.

Thaks.

----------- Daniel Vazart ------------
"Knowledge is power, Sharing is human"
------- http://www.vazart.net --------

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[Message index]

		Need help with CPU shortage By: dvazart on Wed, 17 June 2009 09:08
		Re: Need help with CPU shortage By: maratrus on Wed, 17 June 2009 13:14
		Re: Need help with CPU shortage By: dvazart on Wed, 17 June 2009 13:21
		Re: Need help with CPU shortage By: maratrus on Wed, 17 June 2009 13:57
		Re: Need help with CPU shortage By: dvazart on Wed, 17 June 2009 15:02
		Re: Need help with CPU shortage By: maratrus on Thu, 18 June 2009 08:13
		Re: Need help with CPU shortage By: dvazart on Thu, 18 June 2009 08:43
		Re: Need help with CPU shortage By: maratrus on Thu, 18 June 2009 08:59
		Re: Need help with CPU shortage By: dvazart on Thu, 18 June 2009 11:25
		Re: Need help with CPU shortage By: maratrus on Thu, 18 June 2009 11:48
		Re: Need help with CPU shortage By: dvazart on Thu, 18 June 2009 11:55
		Re: Need help with CPU shortage By: dvazart on Thu, 18 June 2009 13:33

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