[OpenSIPS-Users] Setting opensips for maximum performance

[Bogdan-Andrei Iancu]

Hi Jan,

You need to see where the bottleneck is. If it is not the CPU, it must 
be some I/O blocking opensips. For example the DB may be too slow 
blocking opesips processes -> no process to read traffic from network -> 
traffic discarded, package lost.

So, you should first look with netstat at the UDP sock, to see if the 
in-buffer is full or not (if full, the kernel will discard packages).

Regarding the timeouts (for calls, for retransmissions) see the TM module:
       http://www.opensips.org/html/docs/modules/1.6.x/tm.html#id228443

Regards,
Bogdan

Jan Rozhon wrote:
> Hello,
>
> as a part of my diploma thesis I'm trying to do some performance testing 
> of opensips running on low cost machine with 4GB of RAM and dual-core 
> AMD Athlon processor. As a generator of SIP traffic I use SIPp v3.1 
> running on 4 virtual computers as UAC and two computers as UAS all 
> connected just by gigabit ports of a single switch. My proublem is, that 
> as soon as I reach the load of 200 calls per second (2000 simultaneous 
> calls) many of those calls (aroud 50%) don't finish succesfully. CPU 
> utilization of opensips machine is around 40% and memory around 25%, so 
> the opensips has still a lot of free resources, but it doesn't use them. 
> Could you please advise me, how to change default configuration script 
> and opensips settings to achieve better results?
>
> Right now, the only changes I made is :
> -enabling registrar/proxy authentication;
> -disabled tcp, since all the traffic is carried by udp;
> -set shared memory to 2048 MB;
> -set number of children to 16
> -limit debug level to 1
>
> PS. How can I increase the time, after which opensips retransmits SIP 
> messages?
>
> Thanks in advance,
> Jan
>
>
>
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>
>   


-- 
Bogdan-Andrei Iancu
www.voice-system.ro