Manual page for MACH_SWAPON(8)
mach_swapon - add a file for paging/swapping
SYNOPSIS
mach_swapon
[
-v
] [
-o
options ] file
mach_swapon
[
-v
] [
-f
swaptab ]
-a
DESCRIPTION
Mach_swapon
makes a file available to the system for allocation of paging
and swapping space.
It is normally invoked at boot time by the
/etc/rc
script, and uses information kept in the
/etc/swaptab
file to enable paging on a
file
(which must be specified as a full pathname).
The super-user can run
mach_swapon
at any time to enable system paging on additional files.
OPTIONS
The first form of the command is used to enable paging on
file.
The second form of the command is used to enable paging
on all files listed in the
swaptab
file.
- -a
-
All. Enable paging on all files listed in the
swaptab
file.
- -v
-
Verbose. Print each file as it is enabled.
- -f swaptab
-
Read list of paging files from
swaptab
instead of
/etc/swaptab.
- -o options
-
Specify a comma-separated list of optional characteristics for
the file being enabled.
options
can be selected from among:
-
- prefer
-
Enable this file as a "preferred" paging area. The system will
preferentially allocate space in this paging file over non-preferred
paging files.
- lowat=size
-
Attempt to shrink the file down to the low water mark,
size,
when paging resources are freed. If
size
equals zero, then the paging file does not shrink as resources
are freed.
- hiwat=size
-
Do not grow the paging file above the high water mark,
size.
If
size
is zero then the file will grow as large as needed.
- nocompress
-
Do not compress the swapfile. Normally, the swapfile is compressed, resulting in reduced disk usage and increased swapping performance (there is less to swap). This option will turn this feature off.
FILES
- /etc/swaptab
-
static pager file information
SEE ALSO
mach_swapon.2
swaptab.5
BUGS
There is no
mach_swapoff
command.
There is no way of listing the currently enabled paging files.
Created by unroff & hp-tools.
© somebody (See intro for details). All Rights Reserved.
Last modified 11/5/97
