Advanced Topics › Performance Considerations

Performance Considerations

CA MIM provides resource serialization services among multiple z/OS operating systems. CA MII lets sites share DASD resources, CA MIA lets sites share tape devices. CA MIC allows console data (messages and commands) to be routed across systems. A number of factors, both internal and external to the CA MIM address space, can cause CA MIM to provide less than optimal global ENQ service times.

External factors, like dispatching priority have a direct impact on the performance of the CA MIM address space. These factors can degrade CA MIM ENQ service times.

The following CA MIM internal parameters can also affect performance:

• Type of cross-system communication method selected
• CA MIM features activated
• Type and volume of managed workload
• Page fixing CA MIM control block storage
• Offloading CA MIM work to zIIP engines

This section examines the internal and external factors that can affect CA MIM performance in your environment.