asterisk users - Sep 2013 - high cpu average load

Hello,
 
Running one asterisk server with below details. 
Only SIP to SIP calls. No real time configuration, no recording, no voicemail,
no IVR, no codec translation. Average CPU load varies between 4 to 30 for 150 to
200 concurrent calls and we start getting problem in call quality like delay in
connectivity, voice breakage etc....
 
Hardware: 
2 Physical processor Intel(R) Xeon(R) CPU            5120  @ 1.86GHz
8 GB RAM
500 GB Sata HDD
 
Asterisk: 1.6.2.9
PHP 5.3.3 (cli)
MySQL: 5.0.77 
Linux: CnetOS 5.5 (Final)
 
Please suggest the solution.
 
Thanks,
Kamlesh
 		 	   		  
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On Thu, 5 Sep 2013, Kamlesh Kumar wrote:
> Running one asterisk server with below details.
> Only SIP to SIP?calls. No real time configuration, no recording, no
voicemail, no IVR, no codec translation. Average CPU load varies between 4 to 30
for 150 to 200 concurrent calls and
> we start getting problem in call quality like delay in connectivity, voice
breakage etc....
> ?
> Hardware:
> 2 Physical processor Intel(R) Xeon(R) CPU??????????? 5120? @ 1.86GHz
> 8 GB RAM
> 500 GB Sata HDD
> ?
> Asterisk: 1.6.2.9
> PHP 5.3.3 (cli)
> MySQL: 5.0.77?
> Linux: CnetOS 5.5 (Final)
> ?
> Please suggest the solution.
Need a bit more detail.

The 5120 is kind of a wimpy processor, but what is keeping it busy?

What do 'top' and 'htop' show are consuming the processor?

What is your application?

What are 200 calls doing?

Are you calling a bunch of AGIs written in scripting languages?

Eliminating translation is difficult. How do you know you were successful? 
Do 'module show like codec_' and 'module show like format_' show
anything
unexpected?

-- 
Thanks in advance,
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