You may have heard that Enhanced Statistics were added to DB2 for z/OS with DB2 9, and you probably wondered what they are and how they can help. This presentation will answer your questions about what the statistics are, how they are enabled, how they get collected, and what effect they will have on your SQL execution.
Disclaimer: I do not work for IBM, and the conclusions in this document are resolved from research done by my colleagues and myself. There is no guarantee of the correctness of any statement in this presentation, although I have done as much as I can to verify my conclusions.