[asterisk-users] Too many open files, asterisk crash

[Knud Müller]

Alex Balashov wrote:

> On Thu, 26 Apr 2007, Knud Müller said something to this effect:
>
>> Tzafrir Cohen wrote:
>>
>>> On Thu, Apr 26, 2007 at 08:43:17AM -0500, Jason Fuermann wrote:
>>>
>>>> 1024 open files will get you around 120 concurrent calls. 
>>>
>>>
>>> 8 file-handles per call? Why is that?
>>>
>>>
>> Depends on what channel type you use and what you do in the dialplan. 
>> A file handle is also used for an open socket. I always ran into that 
>> kind of problem when conferencing and play soundfiles to the 
>> conference members. Try before starting asterisk to ulimit your shell 
>> to a higher value of file handles. AFAIK its ulimit -n.
>
>
>   Some aspects of the limit on concurrent file descriptors are still 
> on the kernel side, unfortunately, depending on what you're doing with 
> them.


This is kind of irrelevant for all using linux......
Yep, we have a solaris (10)  box. Asterisk installed fine. But has a 
much tighter open file limit.
Solaris started ages ago with a one byte file handle (256 Open Files) 
they decided to be binary compatible in newer versions. When the need 
came for more open files the fopen() method can handle more files under 
solaris, but the open method  is still limited to 256 Files. The 
asterisk source code showed us that both open methods are spread widely 
over the sources. We started to change into fopen wherever possible but 
been still unable to overcome these limits on solaris by now.

> For instance, if any kind of asynchronous polling of descriptors is done
> with select(), know that FD_SETSIZE is hard-coded into the kernel 
> headers.
>
>   If it's a simple issue of open files, there should be no problem 
> increasing it on the ulimit side.  But more complex operations involving
> concurrent use of descriptors and sockets may require changes to 
> hard-coded parameters.
>
> -- Alex
>
> -- 
> Alex Balashov <sasha at presidium.org>
>
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-- 
Knud A. Müller