Limitations set in SYS1.PARMLIB(BPXPRMxx)

Set MAXASSIZE in SYS1.PARMLIB(BPXPRMxx), which defines the default OMVS address space (process) region size, to 2G. This is the maximum size allowed. This is a system-wide limit, and thus active for all z/OS® UNIX address spaces. If this is not desired, then you can set the limit also just for z/OS Explorer in your security software.

This value can be checked and set dynamically (until the next IPL) with the following console commands, as described in MVS System Commands (GC28-1781):
  1. DISPLAY OMVS,O
  2. SETOMVS MAXASSIZE=2G