check system localhost
    if loadavg (1min) > 4 for 2 cycles then alert
    if loadavg (5min) > 2 for 2 cycles then alert
    if memory usage > 75% then alert
    if cpu usage (user) > 70% for 3 cycles then alert
    if cpu usage (system) > 30% for 3 cycles then alert
    if cpu usage (wait) > 50% for 3 cycles then alert