Use the JESJobSize statement to specify the maximum data set size that is accepted from the JES spool file, in thousands of bytes.
Tip: Set this value for the largest spool job expected and add enough room for future growth.
.-JESJobSize 0------. >>-+-------------------+--------------------------------------->< '-JESJobSize --size-'
Restriction: The JESJobSize value must be greater or equal to the JESMsgSize value.