dynamic_pager(8)

NAME
dynamic_pager - dynamic pager external storage manager

SYNOPSIS
dynamic_pager [-E] [-F filename] [-S filesize] [-H high-water-trigger] [-L low-water-trigger] [-P priority]

DESCRIPTION
The dynamic_pager daemon manages a pool of external swap files which the kernel uses to support demand paging. This pool is expanded with new swap files as load on the system increases, and contracted when the swapping resources are no longer needed. The dynamic_pager daemon also provides a notification service for those applications which wish to receive notices when the external paging pool expands or contracts.

OPTIONS

-E  Encrypt the data in the swap files.

-F  The base name of the filename to use for the external paging files. By default this is /private/var/vm/swapfile.

-S  The fixed filesize [in bytes] to use for the paging files. By default dynamic_pager uses variable sized paging files, using larger sized files as paging demands increase. The -S, -H and -L options disable that default and cause dynamic_pager to use a series of fixed sized external paging files.

-H  If there are less than high-water-trigger bytes free in the external paging files, the kernel will signal dynamic_pager to add a new external paging file.

-L  If there are more than low-water-trigger bytes free in the external paging files, the kernel will coalese in-use pages and signal dynamic_pager to discard an external paging file. Low-water-trigger must be greater than high-water-trigger + filesize.

-P  This option is currently unimplemented.

FILES
/private/var/vm/swapfile*
    Default external paging files.