[SR-Users] Kamailio Registration load Issue

Alex Balashov abalashov at evaristesys.com
Mon Mar 27 21:15:04 CEST 2017

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 at 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
>But when i increase it to 800 reg/sec it starts retransmissions in
>I don't see server's CPU, load-avg or memory shooting. Running
>by default, even using kamctl to start the instance. So I have not
>any params yet.
>My main concern is how can I make server choke and get its actual
>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
>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.

-- Alex

Principal, Evariste Systems LLC (www.evaristesys.com)

Sent from my Google Nexus.

More information about the sr-users mailing list