The first required task is to understand what subsystems are critical to scrutinize. Begin with one or more of the following subsystems:
Weaknesses in each of these areas can generate a significant bottleneck in one or more combinations of other areas. Looking at each one in detail will help determine what sort of impact might be incurred.
The processor is the most obvious component that is critical to the performance of the system. But with a long list of potential counters, you need to pare down what is important to monitor and define the requirement for doing so. There are multiple counters that can be monitored for potential CPU bottlenecks, but the following ...