You want to make sure that there is sufficient paging space allocated. If the block size of page reads as reported by monitor is less than 10, there is probably not enough DASD space allocated for paging. Do not mix paging space with other types of data, including spool space. When using minidisk cache, always have some real storage defined for minidisk cache. Reconfigure expanded storage as main storage if it is specifically for minidisk caching.
Some processors allow a portion of main storage to be configured as expanded storage.
Installations that configure storage as expanded storage in order to do minidisk caching should consider reconfiguring this expanded storage as main storage. However, there can be some advantage to keeping some storage configured as expanded storage to create a paging hierarchy. Consider biasing the arbiter against minidisk cache if the system is very rich in storage. Measurement results to date suggest that in environments that show no storage constraint, the arbiters sometimes use more storage for minidisk cache than is optimal. The more storage constrained a system is, the better the arbiter tends to work.