Calculating IMS data space
Two tables are used to store IMS™ data.
About this task
Collect IMS data
as follows:
- Estimate the number of application programs that are used in the CICS® region that use DLI calls. Call this number NUM_IMS_PROG.
- Estimate the average number of EXEC DLI calls per program. Call this number AVG_IMS.
- Estimate the number of transaction and program associations. In this example, the estimate is that each can be associated with five transactions.
- Calculate IMS data space
as follows:
(75 * NUM_IMS_PROG * AVG_IMS * PROG_TRAN_RATIO) + (20 * NUM_IMS_PROG * AVG_IMS * PROG_TRAN_RATIO) = IMS_DS bytes.