RE: How to get cpu consumption of a php script

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> -----Original Message-----
> From: ash@xxxxxxxxxxxxxxxxxxxx [mailto:ash@xxxxxxxxxxxxxxxxxxxx]
> Sent: Monday, January 17, 2011 2:36 AM
> To: Tanoor Dieng; php-general@xxxxxxxxxxxxx
> Subject: Re:  How to get cpu consumption of a php script
> 
> I can't think of anything except using top or ps. If you can't guarantee what
> process runs what individual script, are you able to just track them all
> globally, and check for differences as you start and stop scripts. Perhaps run
> certain scripts under different users which should give them their own pid (i
> believe, but not tested this) that let's you track them more easily.
> 
> Thanks,
> Ash
> http://www.ashleysheridan.co.uk
> 
> ----- Reply message -----
> From: "Tanoor Dieng" <newstanoor@xxxxxxxxx>
> Date: Mon, Jan 17, 2011 10:23
> Subject:  How to get cpu consumption of a php script
> To: <php-general@xxxxxxxxxxxxx>
> 
> Hi everybody,
> I'm a php developper for a high traffic website. Our web servers run with
> lightty?
> 
> We have some issues with the cpu consumption of our servers.
> 
> The problem is that, we don't know exactly which script consumes so much
> cpu.
> So, we cant to figure out how much cpu does a php script take.
> 
> We have tried 3 methods:
> 
> 1) Microtime: microtime at the beginning and at the end and make the diff.
> The problem with that is that it takes the execution time of the script, but in
> our script we make:
> - connection to database
> - connection to memcache
> - connection to session server
> 
> All of this is not taken into account, so microtime is not that accurate
> 
> 2) Shell command: we get the pid of the process executing the script and
> make a 'top' on this pid . The problem  is that the php-cgi manages many
> threads so it's not accurate too.
> 
> Is there other methods for dealing with this problem.
> 
> Thanks,
> best regards,
> 
> Tanoor.

This is untested.  Within the same script, you could use [1] or similar and combine with shellexec ps/top to get what you need.  I think this would give you a better result.

Regards,
Tommy

[1] php.net/function.getmypid


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