Thanks Muhammad. These are great information. Thank you sharing it with us.
Two follow up questions: 1- What tool did you use to send registers over TCP and keep connections open? 2- What did you set tcp_max_connections to in opensips? Regards, Ali Pey On Sat, Sep 29, 2012 at 10:59 AM, Muhammad Shahzad < [email protected]> wrote: > Every thing is a file in UNIX / Linux, so every TCP connection is a file > too. Also persistent connects are sometime memory intensive too. So make > sure adjust following things carefully. > > 1. Number of Open Files Limit, use either ulimit -n <number> in opensips > startup script or set open_files_limit in global section on opensips dial > plan. I usually use second options and set open_files_limit to 1024000. > 2. Increase TCP children, tcp_children, default is i think 8, increase it > to 16 or even 32 if you have very large deployment, this will speed up > connection processing significantly, however consume much more memory. Also > make sure to set all other TCP related opensips variables to reasonable > values, such as tcp_connect_timeout, tcp_connection_lifetime etc. etc. Look > here for details, > > http://www.opensips.org/Resources/DocsCoreFcn18#toc75 > > 3. If you have a dedicated SIP server, running only OpenSIPs then reduce > stack size as well. I found setting it to 1024KB or even less gives good > results. > > Now some practical results. On Dell server R510 with 8GB RAM and 2.4GHz > quad core Intel processor I was able to test 104,981 concurrent SIP > registrations with load average between 1.0 to 1.5. > > Two important things to remember. > > 1. What is estimated / expected number of requests per second? > 2. What is SIP re-register time? > > For me, i tested up to 350 requests per second with re-register time as > 300 seconds this gives theoretically possible concurrent SIP connections to > 350 x 300 = 105,000. Which means you can't have more then this number of > concurrent connections. So i can safely say per my testing that opensips > can practically handle up to ~100K SIP concurrent connections. > > Thank you. > > > On Fri, Sep 28, 2012 at 7:21 PM, Ali Pey <[email protected]> wrote: > >> I am also interested in this. Any responds/updates? >> >> Regards, >> Ali Pey >> >> >> On Wed, Sep 12, 2012 at 9:34 AM, John Quick <[email protected]>wrote: >> >>> Does anyone know what the practical limit is for the maximum number of >>> TCP >>> connections to OpenSIPS? >>> It is a question that often comes up with clients who are developing >>> SIP-based apps for smart phones. Persistent TCP seems to be strongly >>> favoured over UDP for connections with mobile devices such as iPhone, >>> iPad, >>> etc. However, I cannot even get OpenSIPS to start if I set >>> tcp_max_connections to a number greater than about 55000. Have tried it >>> with >>> v1.7 and 1.8. Is there a way to overcome this ceiling? Has anyone tested >>> it >>> with 10's of thousands of TCP connections? >>> >>> John Quick >>> Smartvox Limited >>> >>> >>> >>> >>> _______________________________________________ >>> Users mailing list >>> [email protected] >>> http://lists.opensips.org/cgi-bin/mailman/listinfo/users >>> >> >> >> _______________________________________________ >> Users mailing list >> [email protected] >> http://lists.opensips.org/cgi-bin/mailman/listinfo/users >> >> > > > -- > Muhammad Shahzad > ----------------------------------- > CISCO Rich Media Communication Specialist (CRMCS) > CISCO Certified Network Associate (CCNA) > Cell: +92 334 422 40 88 > MSN: [email protected] > Email: [email protected] > > > _______________________________________________ > Users mailing list > [email protected] > http://lists.opensips.org/cgi-bin/mailman/listinfo/users > >
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