[asterisk-dev] Dahdi resource limit

[Olle E. Johansson]

3 apr 2012 kl. 17:01 skrev Shaun Ruffell:

> On Tue, Apr 03, 2012 at 10:18:22AM +0200, Olle E. Johansson wrote:
>> Running Asterisk 1.4 and Dahdi 2.5.0 we're hitting a resource limit.
>> 
>> There's a leakage of file handles (both pseudo and timer) but that
>> should not really affect us since we've configured Dahdi to use
>> 4000 file handles. At around 1400 file handles used, we can't
>> start a new meetme, the app complains that it can't allocate a
>> file handle a gives up. This is in a running production system, so
>> I have no means to lab with it. Right now we're restarting it to
>> get rid of the leaked files and keep it running below 1400. 
>> 
>> Upgrading to another Asterisk is out of discussion, so no point in
>> discussing that option either.
>> 
>> There must be something in Dahdi that fails or somewhere else. We
>> have file handles, since we're getting tons of new calls. It's
>> just the meetme that can't open new Dahdi pseudo-file handles.
>> 
>> I am lost how to debug this and provide a good report. Dahdi
>> developers - are you aware of some sort of limit apart from the
>> file handles that can lead to this issue?
> 
> 2.5.0 was the first release to add a module parameter to specify the
> maximum number of psuedo channels that can be opened (and lowered
> limit from hard coded 1024 for all channels to 512 for only pseudo
> channels). Perhaps your bumping into that? 
> 
> The change went in in r9610 "dahdi: Add module parameter to limit
> number of pseudo channels." [1]
> 
> [1] http://svnview.digium.com/svn/dahdi?view=revision&revision=9610

Thanks for the feedback, Shaun!

As I wrote before - we have configured Dahdi to for 4000 file handles,
but still hit some kind of limit around 1400 open ones.

/O