This host-level alert is triggered if the percent of CPU utilization on the
HistoryServer exceeds the configured critical threshold. This alert uses the Nagios
check_snmp_load
plug-in.
Unusually high CPU utilization: Can be caused by a very unusual job/query workload, but this is generally the sign of an issue in the daemon.
A down SNMP daemon on the HistoryServer node, producing an unknown status