Identifying a Storage Processor (Controllers) Overload

To visualize the activity of a controller in an EMC disk array, use the Processor Utilization parameter of the Controller class. A warning is issued when the processor utilization goes too high, which means that the controllers cannot keep up with the load on the disk array. It is then important to identify what is overloading the controllers.

The Response Time parameter of the Controller class represents the average time it took the controller to process the read and write requests of the hosts. The higher the Response Time goes, the slower I/Os the servers will get. By default, the solution triggers a warning when the controller takes more than 10 milliseconds on average to complete the I/O requests and an alarm when the response time reaches 100 milliseconds.