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VM_STAT(1)                               BSD General Commands Manual                              VM_STAT(1)

NAME
     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 (reac-tivated). (reactivated).
             tivated).

     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.

Mac OS X                                       August 13, 1997                                      Mac OS X

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