IAX Thread errors

I’ve noticed this error message happening all to frequently, anyone know what it means?

– IAX2/iaxvoiptalkout-1 answered SIP/212-4de4
Nov 23 16:55:48 WARNING[6664]: chan_iax2.c:7971 network_thread: chan_iax2: ast_sched_runq ran 712 scheduled tasks all at once

The server is chipped with a 3Ghz P4, and there were only two calls running at the time.