[SR-Users] Kamailio consuming UDP packets very slowly leading to high RECV - Q

[Daniel-Constantin Mierla]

Hello,


On 28.08.18 12:42, sagar malam wrote:
> Hello,
>
> I am using Kamailio as a SIP proxy.So it receives SIP packet from
> internet and forwards it to FS servers in local network.When i execute
> "ss" command i see very high value in RECV-Q column.I THINK IT IS NOT
> NORMAL.PLEASE CORRECT ME IF I AM WRONG.
> ====================================================
> [root at fep-1 proc]#  ss -u -a -n -e | grep 5060
> UNCONN     0      0      10.50.8.1:5060 <http://10.50.8.1:5060>       
>              *:*                   ino:6831630 sk:fd <->
> UNCONN     0      0      10.50.7.18:5060 <http://10.50.7.18:5060>     
>                *:*                   ino:6831629 sk:fe <->
> UNCONN     *1183104* 0      10.50.7.254:5060
> <http://10.50.7.254:5060>                     *:*                 
>  ino:6831627 sk:ff <->
> UNCONN     *84864*  0       2607:f900:1:3::254:5060                   
> :::*                   ino:6831628 sk:100 v6only:1 <->
> ======================================================
>
> Initially i thought that there is something in script which must be
> causing kamailio to process UDP request slower but i faced same issue
> with a very simple script where i simply reply with stateless 200 OK
> for each sip request : 
> request_route {
>
>                 sl_send_reply("200","OK");exit;
>         $avp(uuid) = $rm + "-" + $ci;
>
> ........
> .........
> .........
> .......
>
> Server configuration : 
> OS : CENTOS 7
> Kernel : 4.16
> CPU : 5 X Intel(R) Xeon(R) CPU E5-2680 v2 @ 2.80GHz
> RAM : 32 GB
>
> Please help me debugging this issue.Thanks in advance
>
if you have performance issues just with a very simple config sending a
stateless sip reply, then check your system/firewall
configuration/limits. Specially on centos, I have seen a lot of
restrictive traffic rates limits set by selinux. Also, if you run in a
virtual machine, there can be limits enforced by the vm platform.

If you still cannot sort out, I would just run similar tests on a
vanilla debian.

Cheers,
Daniel

-- 
Daniel-Constantin Mierla -- www.asipto.com
www.twitter.com/miconda -- www.linkedin.com/in/miconda
Kamailio World Conference -- www.kamailioworld.com

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