CACHE - Cache Subsystem Activity report
The Cache Subsystem Activity report provides cache statistics on a subsystem basis as well as on a detailed device-level basis.
With the help of cache control units, access time to data that resides on a DASD can be reduced
to the minimum allowed by the speed of the channels, providing significant I/O response time
improvements. Important questions for performance analysts are:
- How many control units do I need?
- What is the optimum size of the cache?
- How much non-volatile storage (NVS) do I need?
- Is the cache performing effectively?
The Cache Subsystem Activity report provides answers to these questions.