Backup process not completing

I have a daily scheduled back process that is hanging when run. It utilizes 99% of the cpu and never completes. I have tried to find a backup log to see at what point the process slips up but hours of web searching has not revealed any location or method for enabling back logging.

Machine Info:
Asterisk (Ver. 1.8.10.1)
Backup & Restore Module 2.10.0.25
FreePBX 2.10.0.4

process info:

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
4496 asterisk 25 0 21612 10m 4856 R 98.9 0.3 818:29.74 php /var/lib/asterisk/bin/backup.php --id=4