Manual page for VM_STAT(1)
vm_stat - show Mach virtual memory statistics
SYNOPSIS
vm_stat [ interval ]
DESCRIPTION
vm_stat
displays Mach virtual memory statistics.
If the optional
interval
is specified, then
vm_stat
will display the statistics every
interval
seconds. In this case, each line of output displays the
change
in each statistic (an interval count of 1 displays the values per
second). However, the first line of output following each banner
displays the system-wide totals for each statistic.
The following values are displayed:
- Pages free
-
the total number of free pages in the system.
- Pages active
-
the total number of pages currently in use and pageable.
- Pages inactive
-
the total number of pages on the inactive list.
- Pages wired down
-
the total number of pages wired down.
That is, pages that cannot be paged out.
- Translation faults
-
the number of times the "vm_fault" routine has been called.
- Pages copy-on-write
-
the number of faults that caused a page to be copied (generally
caused by copy-on-write faults).
- Pages zero filled
-
the total number of pages that have been zero-filled on demand.
- Pages reactivated
-
the total number of pages that have been moved from the inactive list to the
active list (reactivated).
- Pageins
-
the number of requests for pages from a pager (such as the inode pager).
- Pageouts
-
the number of pages that have been paged out.
If
interval
is not specified, then vm_stat displays
all accumulated statistics along with the
page size and the object cache performance.
SEE ALSO
vm_statistics(2)
Created by unroff & hp-tools.
© somebody (See intro for details). All Rights Reserved.
Last modified 11/5/97
