Tuning a global resource serialization complex, like any system tuning process, requires a disciplined approach of measuring the system's performance, setting specific goals, taking actions to reach the goals, then measuring and evaluating the results of the actions.

You will probably want to take a base set of measurements of your system performance before you begin the process of installing your complex and repeat the measurements at several points along the way. You might want to measure your system:

1. Before you begin to install the complex
2. While each system is running as a one-system complex
3. After the initial complex is running
4. After each change to the design of the initial complex — such as adding a system
5. After each tuning change that you make

Obviously, each set of measurements should be taken under the same set of conditions. That is, come as close as you can to ensuring that the system is processing the same workload during each measurement period.