The size of the VSAM files can be calculated with the formulas listed.
Size = ((97 * NUM_REGION_V) +
(127 * NUM_CICS_PROG * AVG_EXEC_SHORT * PROG_TRAN_RATIO *
NUM_REGION_V)) bytes
CIUINT2 - DB2® Size = ((110 * NUM_REGION_V) +
(139 * NUM_DB2_PROG * AVG_DB2 * PROG_TRAN_RATIO *
NUM_REGION_V)) bytes
CIUINT3 - MQ Size = ((103 * NUM_REGION_V) +
(132 * NUM_MQ_PROG * AVG_MQ * PROG_TRAN_RATIO *
NUM_REGION_V)) bytes
CIUINT4 - IMS™ Size = ((65 * NUM_REGION_V) +
(94 * NUM_IMS_PROG * AVG_IMS * PROG_TRAN_RATIO *
NUM_REGION_V)) bytes
CIUINT5 - CICS Size = ((273 * NUM_REGION_V) +
(357 * NUM_CICS_PROG * AVG_EXEC_LONG * PROG_TRAN_RATIO *
NUM_REGION_V)) bytes
CIUINT6 - CICS resourcesSize = (( 97 * NUM_REGION_V) +
( 298 * NUM_CICS_FILE) +
( 204 * NUM_CICS_PROG) +
( 203 * NUM_CICS_TRAN) +
( 249 * NUM_CICS_TDQ) +
( 148 * NUM_CICS_TSQ) +
(1208 * NUM_CICS_WEBS) +
( 100 * NUM_CICS_EXIT)) bytes
CIUINT7
- NaturalSize = ((135 * NUM_REGION_V) +
(159 * NUM_NATURAL_PROG * AVG_NATURAL * PROG_TRAN_RATIO *
NUM_REGION_V)) bytes