Why Use the Workload Reporting Services

The workload reporting services provide information for performance monitors to report on how well an installation is doing in meeting performance goals.

Prior to z/OS® R3, workload reporting services were available to systems running in either goal or compatibility mode. Some of the collected data was different for each mode. The performance monitor should realize the system will now be running exclusively in goal mode, and be able to locate and use the collected performance data appropriately.

For goal mode, with the cooperation of subsystem work managers, the service can provide more performance data than previously reported. They provide information about work that is processed by many address spaces, and allow for a view of subsystem transactions, not just address spaces and enclaves. The data includes:

• Response time information
• Response time distributions
• Execution delay state information for transactions
• Information about service classes that different address spaces are serving.

The services allow a performance monitor to show the goal for a service class period, how well the system is doing to meet the goal, and if it is not meeting the goal, why it is delayed. The performance monitor can show this goal vs. actual data in terms that are consistent for all MVS-managed work.

Table 8 shows an overview of the workload reporting services, and where the information about them is documented.