The Workload Manager – Service Class Detail report has several charts which show information about a particular service class. It shows:
- Service class and goal information
- Performance index
- Velocity
- Service consumed
- Delays
- Response time distribution during the time period, for response time goals
One of the difficulties managing Workload Manager is that the various measurements are interdependent – it is difficult to draw any conclusions from performance index, velocity etc. in isolation.
This report shows various charts together so that the information on one chart can help to interpret the information on other charts. For example, on the chart below, there is a period where the performance index spikes and the work is not meeting its goals. However, we can see that the Service Consumed and Delays are both very low during this period, suggesting that there is actually very little work in this service class at the time. What is probably happening is that when the work is being dispatched it finishes so quickly that we don’t get many “using” samples for the velocity calculation. The Service Consumed and Delay charts tell us that the high performance index during this period is not a problem.
Like all the time based charts, you can click and drag on the chart to zoom in on a time period.