Thanks Alex, that's a great hint. I'll check.
PS: Also thanks a lot for the great blog post on SIP server tuning. On Tue, Mar 28, 2017 at 12:15 AM, Alex Balashov <abalas...@evaristesys.com> wrote: > You might be running into semi-invisible/not widely publicised (but > definitely very real) PPS limits on given instance sizes. > > On March 27, 2017 3:09:56 PM EDT, Jade SZ <jitterbuf...@gmail.com> wrote: > >Hi Guys, > > > >I am running a simple REGISTER load test on: > > > >1) Kamailio sever with 2 cores - mem 5G > >2) Kamailio server with 4 cores - mem 16G > > > >Both are EC2 instances. > > > >At -r = 500 i.e. 500 reg/sec sipP test works fine with very few > >re-trans. > >But when i increase it to 800 reg/sec it starts retransmissions in > >bulk. > > > >I don't see server's CPU, load-avg or memory shooting. Running > >everything > >by default, even using kamctl to start the instance. So I have not > >tuned > >any params yet. > > > >My main concern is how can I make server choke and get its actual > >capacity, > >and avoid these retransmissions as apparently kamailio is not even > >utilizing 2 cores and CPU usage is under 10 always. > > > >Results of both server is same i.e. 500 reg/sec max so I am sure there > >is > >some problem that needs a fix, but need some hints here. > > > >Also used multiple SIPp's to rule out if it is SIPp issue, but after > >500 I > >see same problem. > > > > > >Regards, > >JSZ > > > -- Alex > > -- > Principal, Evariste Systems LLC (www.evaristesys.com) > > Sent from my Google Nexus. >
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