Subparameter definition

value1
Specifies the amount of memory to be assigned below the 16 MB line.
value2
Specifies the amount of memory to be assigned above the 16 MB line, but below 2 GB (that is, “below the bar”.)
Values for REGIONX are defined with nnnnnM for megabytes or nnnnnG for gigabytes.

The installation might reduce the amount of memory to be assigned through the MEMLIMIT keywords in the SMFPRMxx parmlib member, and/or by way of the IEFUSI installation exit or keywords in the SMFLIMxx parmlib member.