[SR-Users] Kamailio Registration load Issue

[Jade SZ]

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 at 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 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
> >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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