Batch execution
Sage provides a batch task called AIOBENCH to allow you to execute the performance index computation in batch mode.
If you want to establish a performance baseline, you can use a recurring task and a workflow to be notified when the value is above what it should be. This can be a preventive measure of a more general problem.
Do not forget that this task stresses your server by adding an important workload during a short period. Only use this tool when a performance diagnosis is requested.