[SR-Users] Over 100% of CPU usage on kamailio

[Konstantin M.]

> do you have heavy traffic on that instance? How many children have you
configured?

Yes, but only a voip. There are over 10k calls per day.
fork=yes
children=4

This configuration is working during 1.5 months without any issues till
now...


> What you can do is to attach with gdb to a process using lot of CPU and
do the backtrace:
>
> gdb /path/to/kamailio __pid__
>
> Replace __pid__ with the PID of process eating the CPU. Then run bt
>
> It may be a deadlock/infinite loop somewhere. I saw three processes in
top, others were down with no much cpu usage.
> Is the SIP routing going fine anyhow when CPU usage is high?

It hard to say 'yes', when looking to call graphs (rrd) I saw that the
calls throughput was slow down...
Looking to logs/PCAP's/etc I'm seeing that some of calls were processed
though (perhaps some of working forks).
But there were > 75-80% of failed calls with 478 Request Terminated.
Also by analyzing a PCAP flows I saw that more than 70% of calls were
de-jittered, de-sync'ed in RTP timestamps, etc...

> How do you solve it, by restart or it just appears from time to time and
solves itself periodically?

I did not restarted kamailio during 20 days, following a charts this
problem was re-appeared during 2 days.

After restart of kamailio -- I can't see any issues for now, there is 0.00
on CPU by all of kamailio instance/forks/etc...

>
>
>
>Cheers,
>Daniel
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