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DCMT VARY SCRATCH Usage

Changing Scratch Parameters

The following information should be taken into consideration when changing scratch parameters:

• A change in scratch location can be done only if scratch is in storage.
• A change in scratch location only affects the location of future secondary allocations. Current allocations are not relocated.
• Decreased values for sec-size-with-unit and limit-with-unit are honored at the time a secondary extent becomes empty.

  Example: prim-size-with-unit=10 MB; sec-size-with-unit=5 MB; limit-with-unit=50 MB; three secondary extents are allocated (25 MB of storage is in use). DCMT VARY SCRATCH LIMIT 20 MB is issued. A secondary allocation is freed only when it becomes entirely unused.