Dispatcher poor performance - sr-users

16 May 2014


      Hi all,
i have a strange performance problem: i placed a dispatcher in front of a
bundle of Kamailio proxies and, even with a really simple dispatching logic
route {
        #ds_select_dstl("1", "2");
        $du="sip:192.168.100.51:5060";
        forward();
}
that actually doesn't even use the dispatcher module i get that when the
server's (192.168.100.51) CPU is 100% used the dispatcher's CPU is ~50%
used. Using the dispatching algorithm based on the hash of the From-URI or
the failover one (that should be the lightest dispatching algorithm,
computationally speaking ...) the performance are almost the same. So,
since i saw that in the documentation that the dispatcher module is
designed to be "suitable for handling heavy SIP traffic", my question is:
what i misconfigured? In my opinion it seems weird that the dispatcher
module is able to manage just (as my tests suggest) just 2 Kamailio SIP
proxies ...
Andrea