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On 01/24/2011 12:04 PM, Marco Aimar wrote:
> Hy,
> I'm use apache 2.2.2.
> Casually I find which some process use very high cpu.
> This is a "top"
>> 21213 wwwrun 20 0 297m 18m 4660 R 98 0.5 100:05.76 httpd2-prefork
>>
>>
>> 21149 wwwrun 20 0 297m 19m 5180 R 96 0.5 97:15.34 httpd2-prefork
>>
>>
>> 20882 wwwrun 20 0 298m 19m 5464 R 95 0.5 96:38.06 httpd2-prefork
>>
>>
>> 20700 wwwrun 20 0 297m 20m 5880 R 94 0.5 101:04.42 httpd2-prefork
>
> Cpu used for first reported process it's 98%.
> There is a one way for know why this appear?
> I think it's some attack or some process php but I can not trace the origin.
Things to look at:
- - Number of connections in state ESTABLISHED
(netstat -aln | grep ESTABLISHED)
- - Compare above with number of hits in your access.log
- - Any errors in the error.log?
- - PHP->Database connection tuning?
(Database should be able to support MaxClients connections)
- - Whats the I/O load of the system?
(iostat)
Mark.
- --
Mark Watts BSc RHCE
Senior Systems Engineer, MSS Secure Managed Hosting
www.QinetiQ.com
QinetiQ - Delivering customer-focused solutions
GPG Key: http://www.linux-corner.info/mwatts.gpg
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