[asterisk-users] Asterisk AGI issues (at high load)

[Deepak]

Thanks. You are right in assumng that we query the database.  I was not
aware that there is  a limit to the number of DB connections to mysql. We
open/close db connections as needed. I will check if there is such a limit
and if yes, post the result.
Would you happen to know where to configure such a limit or what the default
is?

Thanks

On Thu, Jun 4, 2009 at 12:31 PM, David Backeberg <dbackeberg at gmail.com>wrote:

> On Thu, Jun 4, 2009 at 12:15 PM, Deepak <dlalmtl at gmail.com> wrote:
> > Hi, we are experiencing a strange issue and I am hoping someone can point
> me
> > to the right direction or help out with some pointers.
> >
> > We have asterisk 1.6.0.6 with a sangome a104DE card. We have basically 4
> > T1's for a total of DAHDI 96 channels.
> >
> > We have an agi application (php) that acts as a kind of a calling card
> > application.
> >
> > All users are SIP users that make calls and asterisk then bridges the
> calls
> > over T1 to the PSTN (after running agi script). Codec between SIP clients
> > and Asterisk is G729 (96 G729 licenses installed on Asterisk).
> > System has 12 GB of RAM.
> >
> >
> > What we are seeing is the following:
> >
> > 1) All is fine till about 70 calls (70 active calls as displayed by core
> > show channels). But as soon as traffic increases, we see the the a lot of
> > AGI Processes are running and the number of active calls keeps on GROWING
> to
> > 120, 130, ... . THis makes no sense since we can have a maximum of 96
> active
> > calls (4 T1). People calling start experiencing delays (10-15 seconds
> before
> > calls are answered or connected, etc.). Upon doing a "ps -ef" we see a
> lot
> > of AGI processes running that seem to keep growing
>
> There could be a number of external constraints that are causing this.
> One that comes to mind to is something waiting for a database
> connection, then all the other processes that are waiting for the
> database pile up and can't exit until they get their turn.
>
> Do you have a max number of connections on your database? How does the
> AGI know what to do based on the 'calling card information'? I'm
> guessing you store all that in a database, then deduct what the caller
> uses, etc.
>
> You may also enjoy http://us3.php.net/set_time_limit
>
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