[asterisk-dev] Re: [asterisk-users] How accurate is show translation?

[Dinesh Nair]

On 12/23/06 09:51 Leo Ann Boon said the following:
> I would love to hear how others are using the results from show 
> translation in system dimensioning. So far, I feel that dimensioning an 
> Asterisk box is still mostly guesstimation :). Currently, I'm using the 
> 30MHz per call rule to dimension.

on a Pentium D 2.80Ghz, we've sustained 300 simultaneous IAX2 calls 
terminating in a dialplan loop that answers the call, waits 2 seconds, 
plays demo-instruct and loops again.

a cursory examination revealed that a large portion of the CPU was used to 
handle NIC interrupts. occasionally we got a chan_iax2.so error which said, 
  "Maximum trunk data space exceeded to..."

this seems to be controlled by the MAX_TRUNKDATA constant in chan_iax2.c 
which is set to 40ms of SLIN for 200 calls. it'd be nice to know what this 
constant is for and what would the implications of increasing it be.

[cc'ed to -dev as well]

-- 
Regards,                           /\_/\   "All dogs go to heaven."
dinesh at alphaque.com                (0 0)   http://www.openmalaysiablog.com/
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