Active threshold monitor role
To evaluate the thresholds of each particular rule the internal performance monitoring
process retrieves the latest metric values. The query is done by a node designated as the
pmcollector. If the environment has multiple pmcollectors, then the system designates one
pmcollector to address the performance monitoring queries. This pmcollector node is assigned the
ACTIVE THRESHOLD MONITOR role. All other pmcollector nodes are assigned the
STANDBY role.
The ACTIVE THRESHOLD MONITOR role of the node is also used to assign the metric
evaluation status for the rules including aggregated results over multiple entities or having a
cluster-wide metric in the rule definition.
In case the ACTIVE THRESHOLD MONITOR node has lost connection or is
unresponsive, one of the STANDBY pmcollector nodes take over the responsibilities
of the ACTIVE THRESHOLD MONITOR. In such cases, the status report for the
cluster-wide threshold rules is redirected to the new ACTIVE THRESHOLD MONITOR.
You can use the mmhealth thresholds list command to identify which of the
pmcollector nodes is designated the ACTIVE THRESHOLD MONITOR role at the current
time.
ACTIVE THRESHOLD MONITOR role in real
time. mmhealth thresholds list
active_thresholds_monitor: g5160-12d.localnet.com