Question:
I would know if moving from DB2 7 to DB2 8 changes the way SMF records are
created when running DB2 / CICS|BATCH|TSO commands.
Answer:
Yes, it is possible that you will notice SMF 101 data volume / content
changes, if you implement the new DB2 V8 option ACCUMACC. IBM did not
add a “number of times package allocated” count (IFCID 0239) until DB2 v9,
necessary with ACCUMACC and thread-reuse, in order to more accurately
derive average statistics.
Aside from DB2 V8, thread reuse can also contribute to SMF 101 data volume
reduction, and presents some challenges with accurately counting thread-
executions (field QWACPCNT) and packages-allocated (?) with a given SMF
101 record.
