[asterisk-users] Asterisk high load when streaming MOH

[Markus]

Am 20.09.2013 15:17, schrieb jg:
> Sometimes I see something similar on my systems when several (3 or more)
> MOH streams are fed by mpg123. Suddenly some or all streams are
> stuttering, but the CPU load doesn't seem to go up significantly.

My CPU load is permanent at 200-250%. I have 7 active mpg123 streams.

On another box running Asterisk 10.8.0, 4x 2.4 GHz, I have 49 active 
streams, but they get fed via mplayer instead of mpg123. There the load 
is close to zero, but I have to say that I have only 1-2 concurrent 
callers there. Strange!

> Have you looked at what is happening with the receive queue of mpg123
> (pgrep mpg123 and netstat -t -p)?

netstat -t -p shows me each of the 7 IP addresses and Recv-Q has some 
bytes listed (55000 - 113000) for each IP. According to man netstat 
Recv-Q means "The count of bytes not copied by the user program 
connected to this socket". Note the "not". Now, is that good or bad?

> I have written a small daemon for myself that watches the receiving tcp
> streams and if nothing seems to be happening, simply touches
> musiconhold.conf and issues an "asterisk -rx \"moh reload\"". Not nice,
> but it works, eventually. When I listen to the same music streams I find
> that they are not as stable as one would wish, at least at a time scale
> of several hours.

What I do is simply call killall mpg123 every 10 minutes via cron. 
Asterisk MOH will restart the process immediately and there will be less 
than a second of silence for the listener. Not that elegant but it helps 
with hanging audio streams...

> When using several moh file classes, I have never hat audio problems.

Me neither.

Thanks!
Markus