Distribution of queues on page sets

The distribution of queues on page sets can have an impact on performance. This can be indicated by poor response times experienced by transactions using specific queues that reside on heavily used page sets. RMF reports might show heavy I/O to volumes containing the affected page sets.

We can assign queues to specific page sets by defining storage class (STGCLASS) objects specifying a particular page set, and then defining the STGCLASS parameter in the queue definition. It is a good idea to define heavily-used queues on different page sets in this way.