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Backing virtual storage for a subspace z/OS MVS Programming: Extended Addressability Guide SA23-1394-00 |
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Subspaces can be backed by real storage either above or below 16 megabytes. Backing the subspace below 16 megabytes is more costly in the event of a page fault. Back a subspace with storage above 16 megabytes unless an old application, which must run below 16 megabytes, will run in the subspace. |
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