Answer / xyz

Specifies the amount the workspace required by the
operating system to execute the JOB
Value specified will apply to each step
Formats are:
REGION=<value>K
REGION=<value>M
REGION parameter should only be in units of “K” or “M”
indicating Kilobytes or Megabytes of workspace requested;
Results in JCL error if unit is not specified
If omitted, a default value is assigned by the system
If REGION=0M is specified, the system takes the most
optimum space

Answer / guest

REGION specifies the maximum CPU memory allocated for a
particular job or job step. If REGION is in the JOB card, it
relates to the entire job; if in the EXEC statement, it
relates to the job step.

Answer / remay

Use of REGION=0M in JCL jobcard grants the job
full access to available storage in address space.

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