Hello, 

I am just curious what is a scenario or configuration which can cause that and therefore need for such monitoring.

The remote endpoints are not SIP endpoints? Are you monitoring async_workers? 

Arsen

On Sat, Jan 4, 2025 at 7:55 PM Henning Westerholt via sr-users <sr-users@lists.kamailio.org> wrote:

Hello Alex,

indeed, this is easier to analyse with the usual system management tools.

Small addition, for TCP and TLS there is actually a distributor or main process inside Kamailio:

$ kamcmd ps |grep tcp |grep main
18439   tcp main process

$ netstat -nap |grep 5060 | grep 18439
tcp         0      0 116.203.XXX.XXX:5060    0.0.0.0:*               LISTEN      18439/kamailio
tcp         0      0 116.203.XXX.XXX:5060     0.0.0.0:*              LISTEN      18439/kamailio
tcp         0      0 127.0.0.1:5060          0.0.0.0:*                       LISTEN      18439/kamailio
tcp6       0      0 2a01:4f8:XXXX:XXXX::5060 :::*                     LISTEN      18439/kamailio

Cheers,

Henning

> -----Original Message-----
> From: Alex Balashov via sr-users <sr-users@lists.kamailio.org>
> Sent: Samstag, 4. Januar 2025 18:01
> To: Kamailio (SER) - Users Mailing List <sr-users@lists.kamailio.org>
> Cc: Alex Balashov <abalashov@evaristesys.com>
> Subject: [SR-Users] Re: children monitoring
>
> It's hard for children to introspect on and report their own busy status, and
> there's no distributor/supervisor process that has that kind of awareness
> about the children[1].
>
> `ss -nl` (or `netstat` equivalent) will show you, in the RecvQ column, the
> number of packets (UDP) or connections (TCP) that are stacked up and going
> unreplied by any child. This figure should be 0 or substantially 0 if things are
> going well.
>
> -- Alex
>
> [1] Notwithstanding the recent 6.x change that optionally adds such a
> process.
>
> > On Jan 4, 2025, at 2:31 am, Sergey Safarov via sr-users <sr-
> users@lists.kamailio.org> wrote:
> >
> > If TCP children are busy,
> > Please correct me if I am wrong if the remote IP is not responding via TCP
> protocol, this leads to a timeout and this child is busy.
> > If many remote endpoints are not reachable via TCP this can lead to the case
> when half or more children are by timeout operations.
> >
> > I think required to monitor how many children are busy.
> > Is it possible to get such info using kamcmd utility, statistics module, or
> xprom module.
> >
> > Sergey
> > __________________________________________________________
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> sender!
>
> --
> Alex Balashov
> Principal Consultant
> Evariste Systems LLC
> Web: https://evaristesys.com
> Tel: +1-706-510-6800
>
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--

Arsenii Semenov

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