After setting a number of Thresholds in the Monitoring Profiles (MP) Event Rules, no Threshold Events are being triggered despite many devices in the associated Groups associated to the MP attached.
The Data Aggregator shows a yellow Degraded state on the System Status page.
The Data Aggregator System Status page entry shows Threshold Monitoring is Disabled.
When any Threshold Evaluations against a Metric Family take over 80% of a poll cycle to complete, the Threshold Monitoring engine transitions to a Degraded state.
When this takes place, a system Event is generated against the Data Aggregator noting that if Threshold Evaluations continue to take over 80% of a poll cycle, the Threshold Evaluation engine will be disabled if it persists for 15 minutes.
All supported DX NetOps Performance Management releases
Threshold evaluations are not resumed automatically after they are suspended even if the product is restarted.
Follow these steps to check and see if threshold events were shut off.
For further information on Threshold Events and Threshold Event processing see the Threshold Monitoring and Threshold Limiter Behavior documentation.