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From Mark Watts <m.wa...@eris.qinetiq.com>
Subject Re: [users@httpd] high cpu process
Date Mon, 24 Jan 2011 12:32:31 GMT
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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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