NAME

swap − swap administrative interface

SYNOPSIS

/etc/swap −a swapdev swaplow swaplen
/etc/swap −d swapdev swaplow
/etc/swap −l

DESCRIPTION

swap provides a method of adding, deleting, and monitoring the system swap areas used by the memory manager.  The following options are recognized:

−a Add the specified swap area.  swapdev is the name of the block special device, e.g., /dev/dsk/c0d1s4.  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.  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 block special device, e.g., /dev/dsk/c0d1s4.  swaplow is the offset in 512-byte blocks into the device where the swap area should begin.  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 the 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 512-byte blocks. 

LEN The swaplen value for the area in 512-byte blocks. 

FREE The number of free 512-byte 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. 

September 02, 1992