.TH SWAPTAB 5 "March 1, 1989" "Apple Computer, Inc." .SH NAME swaptab \- static table of paging files .SH SYNOPSIS .B /etc/swaptab .SH DESCRIPTION The .B /etc/swaptab file contains entries for files that can be enabled for system paging/swapping. This file is read automatically by the .BR mach_swapon (8) command at system startup time. If you change this file, the changes will not take effect until the system is rebooted. .PP An entry for a paging file consists of a line of the following form: .IP .I file\ \ \ \fR[\fIoption\fR[\fB,\|\fIoption\fR]\|.\|.\|.] [\fB# \fIcomment\fR] .TP 20 .I file is the pathname of the file to page into .TP .I option is one of: .RS .TP .B prefer Enable this file as a "preferred" paging area. The system will preferentially allocate space in this paging file over non-preferred paging files. .TP .B noauto Do not enable this file when .B mach_swapon -a is called. .TP .BI lowat= size Attempt to shrink the file down to the low water mark, .IR size , when paging resources are freed. If .I size equals zero, then the paging file does not shrink as resources are freed. .TP .BI hiwat= size Do not grow the paging file above the high water mark, .IR size . If .I size is zero then the file will grow as large as needed. .TP .B 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. .RE .TP .I comment Anything preceded by a .RB "# " is ignored. .SH EXAMPLE .LP .ta 0.8i 1.6i 2.4i 3.2i 4.0i .nf # # /etc/swaptab # /private/vm/swapfile lowat=20971520 # 20 Meg low water mark .fi .br .ne 6 .SH FILES .PD 0 .TP 20 .B /etc/swaptab .PD .SH "SEE ALSO" .BR mach_swapon (2), .BR mach_swapon (8) .SH WARNINGS Entries beginning with whitespace will be ignored.