MacKinney Systems, Inc.

Q:

How can Listcat Plus be used to help tune production VSAM files in order for them to operate at their optimum performance?


A:

Listcat Plus prints VSAM tuning messages and suggestions, either as part of the report for all files, or as a separate report that just contains files that have tuning messages.  Some of the key statistics and calculations that are involved include data and index CI and CA size, bufferspace size, EXCP to I-O ratio, and number of index levels.