FMS Hardware Parameter MDHOW

Data Type

Integer

Default Value

Usually 0, but may be different on some machines.

DESCRIPTION:

This parameter determines the system service used for allocating FMS memory. Not all options are available on all machines. The options are:

• 0, mmap
  This is the preferred method and is used when available. It provides for a paging file in case the pages are faulted. This page file may be the system page file (NPOAGE=-1, or a private page file (NPOAGE=0).
• 1, malloc
  Where mmap is not available, this service is used. The amount of memory available may be limited.
• 2, shm
  On some systems, this service can provide special features, including large page sizes. Usually the amount of shared memory available must be created prior to the run. Memory allocated using shm is usually not swapped to disk.
• 3, fixed array at 5 Mbytes.
  This option is mostly used for testing or debugging.

Because this parameter effects actions during FMSINI, it must be set in the License File.

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