[asterisk-users] Troubleshooting load issues

[Doug Lytle]

>>> All the calls are using ulaw. The files that I am playing are gsm. I suppose doing a file convert with sox to .ulaw may help but it should be able to do 500 calls without an issue. Can it possibly be a bug? if not how do >>> I profile which call(s) can be causing the spike? 

One of the things that come to mind is that the operating system is flushing your SSDs at the time of the spike.  You could always use iotop to watch what the file system is doing at the time of the spike.

Doug