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 abalashov@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 jitterbuffer@gmail.com wrote:
Hi Guys,
I am running a simple REGISTER load test on:
- Kamailio sever with 2 cores - mem 5G
- 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.