SWAP(8) Domain/OS BSD SWAP(8)
NAME
swap - swap administrative interface
SYNOPSIS
/etc/swap -a swapdev
/etc/swap -d swapdev
/etc/swap -l
DESCRIPTION
swap provides a method of adding, deleting, and monitoring the system
swap areas used by the memory manager.
OPTIONS
-a Add the specified swap area. swapdev is the name of the block
special device, e.g., /dev/dsk/w0d0s1. This option can only be
used by the super-user. Swap areas are normally added by the
system start up routine /etc/rc when going into multi-user
mode.
-d Delete the specified swap area. swapdev is the name of the
block special device, for example, /dev/dsk/w0d0s1. Using this
option marks the swap area as "INDEL" (in process of being
deleted). The system will not allocate any new blocks from the
area, and will try to free swap blocks from it. The area will
remain in use until all blocks from it are freed. This option
can only be used by the super-user.
-l list the status of all swap areas. The output has four
columns:
DEV The swapdev special file for the swap area if one can
be found in the /dev/dsk or /dev directories, and its
major/minor device number in decimal
LOW The swaplow value for the area in 1-KB blocks. This
value is always displayed as 0.
LEN The swaplen value for the area in 1-KB blocks.
Information is displayed for the volume as a whole.
FREE The number of 1-KB blocks in the area. If the swap
area is being deleted, this column will be marked
INDEL.
WARNINGS
No check is done to see if a swap area being added overlaps with an
existing swap area or file system
NOTES
Under other implementations swap takes additional arguments, as follows:
/etc/swap -a swapdev swaplow swaplen
swaplow is the offset in 512-byte blocks into the device where the swap
area should begin. swaplen is the length of the swap area in 512-byte
blocks.
/etc/swap -d swapdev swaplow
swaplow is the offset in 512-byte blocks into the device where the swap
area should begin.