[CentOS] High load since passing from rhas3 to centos4.8

fortin.pierre at bell.ca fortin.pierre at bell.ca
Thu Jan 14 20:02:29 UTC 2010


>> We are migrating HP servers from RHAS3 to centos 4.8. Since, the load
>> average is reaching really high values. Under usage we see loads of 15-20
>> instead of the 0.5-1.5 we were used to.
>>
>> I searched a lot for information on such an issue. Iostat, vmstat, top, ps.
>> But I don't get significant hint.
>>
>> Cpu usage remains low, IO wait remains low, no disks are lagging, no swap
>> usage.
>>
>>
>>
>> Are there some tool / other way to diagnose why the load average is high?
>> Like which processes are waiting, where they are stuck. Are there calls to
>> drivers or system process that are slow?

>Are you by any chance now running a CPU throttling program and weren't >before?

ACPI is not enabled. Other than that I couldn't tell. Sorry if it sounds noob.
What can I check to be sure nothing is throttling the CPU?

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