[Freeswitch-users] freeswitch suddenly very slow

[Guillermo Ruiz Camauer]

Do the logs show anything?  Top?  Free space on disk? Have you added
any hardware lately?  Changed configurations?  Updated OS?

Guillermo

Sent from my iPhone

On 18/06/2013, at 23:57, "devel at omninet.eu" <devel at omninet.eu> wrote:

> Hello,
> I am facing a very strange problem: my fs server suddenly performs very
> very slow.
> Here a description of the system:
> Debian 7, odbc, mysql is on another server, xml_curl for the users
>
> Suddenly the server stops responding to registration requests or answers
> with a very big delay. Sometimes I see there a message “503 System Busy”.
> When this behavior starts, the active calls can continue, without any
> issue. The problem is with new requests of any type.
> Once, during this phase, I’ve tried to start manually (cli) the watchdog.
> It crashed the fs session immediately. I thought I found the problem and
> next time I started the watchdog while the system was running well. The
> watchdog did not recognize the problem when fs was running again very
> slow.
> Sofia siptrace shows the registration attempts. Almost no answers are shown.
> Tracing on the network side shows the registration attempts arriving, but
> usually there is no response from the server. No other activity towards
> mysql.
>
> Restarting freeswitch can solve the problem for a few minutes, sometimes
> for several hours, but it suddenly happens again. Lately, even after the
> restart the speed is not coming back to normal.
> This happened also during the night, with almost no calls and only
> registration requests coming in. In the morning there was no user
> registered. We restarted fs and the registrations started over.
>
> I’ve tried to restart also Apache, MySQL, without noticing any difference.
> Also a reboot of the server did not help.
>
> A workaround now is to increase the re-registration timer for the
> registration. Now I can see that sometimes the response to the
> registration attempt is immediately, sometimes there is a bigger delay,
> but enough for the client to stay registered. With some clients the
> registration has a bigger delay and they get un-registered.
> It looks like suddenly we have a  bottleneck, but I can’t find it.
>
> I forgot to mention, that the server hardware has plenty of resources (24
> GB RAM, 4 cores, cpu running very low).
>
> In the past I have seen similar behavior, when we had some attacks from
> “bad guys”, trying to place a lot of calls at the same time… We can’t see
> such an attack now.
>
> Does anybody have an idea into which direction to continue investigating?
>
> Thank you
> A
>
>
>
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