[Asterisk-Users] 191st simultaneous call fails

[Jim Gottlieb]

I've been testing both T400P and TE405P boards and I'm running into
some kind of hard limit on the number of simultaneous calls.  This is
on x86 with 2 Athlon MP 2800+ CPUs running Fedora Core 1.

Everything is fine up to 190 channels, but the 191st call fails every
time with errors like:

Dec 14 15:44:00 WARNING[1215]: Unable to start PBX on Zap/201-1
Dec 14 15:44:00 WARNING[1215]: Failed to create update thread!
Dec 14 15:44:00 WARNING[1215]: Unable to start PBX on channel 0/9, span 9
Dec 14 15:44:00 WARNING[1215]: Call specified, but not found?
Dec 14 15:44:00 WARNING[1215]: Hangup on bad channel 0/9 on span 9

It's not tied to which channel the call comes in on.  It's some
resource that's exhausted after 190 calls.  A limit on threads?

I thought it might be per-process file descriptors even though we were
only going up to 529 on that PID and I used 'ulimit -n' to increase it
before starting asterisk, but that didn't make a difference.

# cat /proc/sys/kernel/threads-max 
14336

I would think that's enough, but perhaps the per-process limit is much
lower.

Any clues?

Thanks...