Hi All,

I am experimenting with Kamailio 5.3.3 as an IMS and I am trying to do load tests

I am using SIPp to generate SIP.REGISTER and MariaDB and a DIAMETER tool ( seagull)

For now I achieved registrations with "speed" 200 per/sec.

When I send SIP.REGISTER faster(let's say 500 per/sec) I see some SARs missing, not sent at all.

I start debugging and found that cxdx_send_sar is responsible to creating SAR message. I put my debug message in it.

The strange thing: there is a mismatch of my debug message (cxdx_send_sar invocation) and real SAR send over the network.

What is the thing I missing  ?

Is there anything else responsible for SAR creating except  cxdx_send_sar ?

Did someone made similar tests ?

my test machine is Centos 7 with 3.10.0

Intel(R) Core(TM) i7-9700K CPU @ 3.60GHz

16G RAM

During this tests I see kamailio very low CPU usage, even when I push it with 500/sec

The biggest CPU load is in MariaDB, but I do not have issues with UAR and MAR