For CPU usage monitoring:
http://ganglia02.slac.stanford.edu:8080/ganglia/batch/?m=load_one&r=week&s=descending&c=suncat&h=&sh=1&hc=4&z=small
To look for memory/CPU problems:
http://nagios.slac.stanford.edu/nagios/cgi-bin/status.cgi?hostgroup=SUNCAT%20cluster&style=detail
There is also some history in /scswork/ranger