The size of the VSAM files can be calculated with the formulas listed.
Size = ((109 * NUM_REGION_V) +
(139 * NUM_CICS_PROG * AVG_EXEC_SHORT * PROG_TRAN_RATIO *
NUM_REGION_V)) bytes
CIUINT2 - DB2® Size = ((122 * NUM_REGION_V) +
(151 * NUM_DB2_PROG * AVG_DB2 * PROG_TRAN_RATIO *
NUM_REGION_V)) bytes
CIUINT3 - MQ Size = ((163 * NUM_REGION_V) +
(192 * NUM_MQ_PROG * AVG_MQ * PROG_TRAN_RATIO *
NUM_REGION_V)) bytes
CIUINT4 - IMS™ Size = ((77 * NUM_REGION_V) +
(106 * 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 = (( 128 * NUM_REGION_V) +
( 377 * NUM_CICS_FILE) +
( 280 * NUM_CICS_PROG) +
( 279 * NUM_CICS_TRAN) +
( 325 * NUM_CICS_TDQ) +
( 920 * NUM_CICS_EVENT)+
( 224 * NUM_CICS_TSQ) +
(1539 * NUM_CICS_WEBS) +
( 176 * NUM_CICS_EXIT)) bytes
Size = ((127 * NUM_REGION_V) +
(171 * NUM_NATURAL_PROG * AVG_NATURAL * PROG_TRAN_RATIO *
NUM_REGION_V)) bytes