The following options are available:
- -1, Use the system page file.
- 0, Use a page file created by FMS.
FMS opens its own page file in the directory pointed to by FMSPAGE. This option is not recommended. Most UNIX systems will attempt to keep this page file consistent with the FMS memory, resulting in excessive page file activity.
- 1, Virtual to Real memory (VMS only)
Use virtual to real memory (no page file required). Applies to Digital systems running VMS only. The memory is locked in the system and cannot be paged. Physical and virtual addresses are the same.
- 2, Option 1 if it fits, otherwise Option 0.
Use virtual to real memory if it fits (Option 1). If it does not fit or the virtual to real memory is busy, use the FMS page file (Option 0).
On virtual memory machines, memory must be backed up by a page file. Because FMS may use more memory than typical applications, an option is provided to have FMS create its own page file.
When using the system page file, you do not need to create a directory for the FMS page file or define the environment variable FMSPAGE which points to it.
If you want FMS to create a private page file, you must create a directory FMSPAGE where the page file will be placed. In addition you must define the environment variable FMSPAGE to point to that directory. FMS automatically generates unique file names for the page files in directory FMSPAGE. When a job terminates normally, its page file is deleted.
VMS systems contain a range of addresses which are ignored by the virtual memory system. Data addressed in this range provide improved access performance for both processors and I/O systems. You may use these addresses by specifying NOPAGE=1.
Because this parameter affects actions during FMSINI, it must be set in the License File.