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

[sagar malam]

Thanks for prompt response.

Some more information :

We are running it on virtual machine(Xenserver).
Selinux and IPtables  are  disabled.I will check if VM platform is putting
some limits or not.
Further i have same Kamailio script in another server and i am not facing
this issue there.
OS max UDP buffer limit parameters is configured as below :
net.core.rmem_max=26214400
net.core.rmem_default=26214400

Any other clue is most welcome.

On Tue, Aug 28, 2018 at 5:01 PM Daniel-Constantin Mierla <miconda at gmail.com>
wrote:

> 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                     *:*
>          ino:6831630 sk:fd <->
> UNCONN     0      0      10.50.7.18:5060                     *:*
>          ino:6831629 sk:fe <->
> UNCONN     *1183104* 0      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.comwww.twitter.com/miconda -- www.linkedin.com/in/miconda
> Kamailio World Conference -- www.kamailioworld.com
>
>
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