What kind of performance improvement can I expect to see from HiperDispatch?
The magnitude of the potential improvement from HiperDispatch is related to: a) the number of physical processors, b) the size of the z/OS images in the configuration, c) the logical:physical overcommit ratio and, d) the memory reference pattern or storage hierarchy characteristics of the workload Generally, a configuration where the largest z/OS image fits within a book will see minimal improvement. Workloads that are fairly CPU-intensive (like batch applications) will see only small improvements even for configurations with larger z/OS images since they typically have long-running tasks that tend to stick on a logical engine anyway. Workloads that tend to have common tasks and high dispatch rates as often seen in transactional applications may see larger improvements, again depending on the size of the z/OS images involved. LPAR configurations that are over committed, i.e. have higher logical to physical ratios, may see some improvement although the benefit of dispatching to a reduce
