Summary....

Monitoring/Tracking Performance on a regular basis is Vital
There is a lot of information available, and some of it is outside the DB2 Statistics and Accounting records
- You must know/learn about other areas, such as CICS/IMS, MVS, DASD, etc, etc
After the physical application design and SQL coding, Buffer Pools are the big Tuning Lever...
The BASICS of performance Don’t Change.........