Incidents are events that indicate I/O performance issues on a volume workload caused by contention on a cluster component.
Performance Manager monitors the I/O response time and operations for volumes on a cluster. When other workloads overuse a cluster component, for example, the component is in contention and is unable to perform at an optimal level to meet workload demands. The performance of other workloads that are using the same component might be impacted, causing their response time to increase. If the response time crosses the performance threshold, Performance Manager triggers an incident alert to notify you.
An incident may occur for only a brief moment and then correct itself once the component it is using is no longer in contention. A continuous incident is one that reoccurs for the same cluster component within a 5 minute interval and remains in the new state. Incidents that remain unresolved, which have a state of new, can display different description messages as workloads involved in the incident change.
The incident alerts are displayed on the Dashboard, Volume Details page, and are sent to specified email addresses. If you have configured OnCommand Unified Manager to receive incident alerts from Performance Manager, the incidents are also displayed on the Unified Manager Dashboard. You can view detailed analysis information about an incident and get suggestions for resolving it on the Incident Details page.
In the example above, an incident is indicated by a red dot () on the Response Time chart on the Volume Details page. Pointing at the red dot displays a popup with more details about the incident and options for analyzing it. If an incident has remained in the new state, it is ongoing, or continuous, and the blue line for the actual response time displays red for the duration of the incident.