Workload considerations

The rate of global resource requests is the number of requests a system generates in a given time period. The rate depends on the workload. Thus, the workload on the systems in the ring also affects ring performance. TSO/E or a batch workload normally creates more global resource requests than a workload that is mostly CICS®, or IMS™.

The workload can also determine how important ring performance is. Ring performance is especially important to installations that:

Run time-sensitive jobs that use global resources or jobs (like HSM back-out) that must complete in a predetermined amount of time
Are experiencing resource contention problems
Are planning to use the ring to serialize catalog access

Such installations need the lowest possible RESMIL value. See Tuning the complex for more information on performance.

Setting the RESMIL value differently according to the processor's power does not affect the time (or processor utilization) a system spends processing global resource requests; a system, regardless of the RESMIL value, processes all requests in the incoming RSA-message before it sends the outgoing RSA-message. The RESMIL value affects only the time (or processor utilization) a system spends on ring processing. There is no benefit in trying to use the RESMIL value to adjust for differences in processor power; only the sum of RESMIL values is significant.