| Re: Need help with CPU shortage [message #36420 is a reply to message #36414] |
Wed, 17 June 2009 15:02   |
dvazart
Messages: 37
Registered: October 2008
Location: France
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Thanks for the explanation.
Finally, noting the times at which the CPU is saturated, I find a crontab from ISPConfig (check_services.php) we have about 100 VEs with ISPconfig installed, so every 30 minutes the CPU reaches the 100% and all the ISPconfig crontabs are running... (now i have to find how to edit the crontab with a shell script in debian).
But your explanation about CPULIMITs its very interesting... so you think we can have 200 VEs running in the same server without CPULIMITS ? We want to have 4 diferents plans of VPS with diferent resources, in our case do you think its possible without CPULIMITS ? and what about the number of CPUS for each VE?
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The first provided output of htop utility shows rather big load average value. There are either processes that couldn't obtain CPU (e.g. because of the CPULIMIT) or processes in D-state producing a lot of i/o operations. BTW, does htop takes into account processes that are in D-state? Is it worth either tuning it or comparing htop output with 'top' or/and 'ps' outputs?
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So in this case its probably that the script (check_services.php) causes the iowait that we can see in the second image ?
( http://picasaweb.google.com/lh/photo/jUNQXmiO0x7JMkxJSLUv6w? feat=directlink)
thaks..
----------- Daniel Vazart ------------
"Knowledge is power, Sharing is human"
------- http://www.vazart.net --------
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