Kernel-Managed Swap Facility (KMSF) Manual

NSKCOM Command Reference
Kernel-Managed Swap Facility (KMSF) Manual—425824-005
4-3
ADD Command
MAX[EXTENT[S]] maximum-extents
specifies the maximum number of extents for the file.
For both Format 1 and Format 2 files:
•
The minimum value is 16
•
The default value is 64
For Format 1 files, you can specify a maximum value up to 800. However,
because of 32-bit addressing, Format 1 files are limited to a maximum size of
2047 megabytes, where:
2047= EXT * MAXEXTENTS * 2048 bytes.
For Format 2 files, the maximum value is 800.
If each extent is 1 megabyte (512 disk pages), then MAXEXTENTS is
equivalent to SIZE.
SIZE filesize {KB | MB | GB | PAGES}
specifies the size of the file, where SIZE = EXT * MAXEXTENTS * 2048 bytes.
KB, MB, and GB are abbreviations for 1,024, 1,048,576, and 1,073,741,824
bytes respectively. PAGES is the number of memory pages (not disk pages).
The entered value is rounded up to make the extent size a multiple of
processor page size, if necessary.
The default file size for a configured swap file is 64 megabytes, fully allocated.
The minimum file size is 256 kilobytes, but using the minimum value is not
recommended.
The maximum size for a Format 1 swap file is 2047 megabytes.
The maximum size for a Format 2 swap file is 100 gigabytes.
If each extent is 1 megabyte (512 disk pages), then SIZE is equivalent to
MAXEXTENTS.
THRESH[OLD] percent-full
is the percent in-use monitoring value for a swap file. If usage exceeds the
threshold, an Event Management Service (EMS) event is generated.
Exceeding the threshold value does not prevent usage of the swap file.
The minimum threshold is 1 percent.
The default threshold is 85 percent.
The maximum threshold is 100 percent.