vm_stat(1) BSD General Commands Manual vm_stat(1)

## NAME

vm_stat-- show Mach virtual memory statistics

## SYNOPSIS

vm_stat[[-ccount]interval]

## DESCRIPTION

vm_statdisplays Mach virtual memory statistics. If the optionalintervalis specified, thenvm_statwill display the statistics everyintervalseconds. In this case, each line of output displays the change in each statistic (anintervalcount of 1 displays the values per sec- ond). However, the first line of output following each banner displays the system-wide totals for each statistic. If acountis provided, the command will terminate aftercountintervals. 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 speculative the total number of pages on the speculative list. Pages throttled the total number of pages on the throttled list (not wired but not pageable). Pages wired down the total number of pages wired down. That is, pages that cannot be paged out. Pages purgeable the total number of purgeable pages. 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). Pages purged the total number of pages that have been purged. File-backed pages the total number of pages that are file-backed (non-swap) Anonymous pages the total number of pages that are anonymous Uncompressed pages the total number of pages (uncompressed) held within the compres- sor Pages used by VM compressor: the number of pages used to store compressed VM pages. Pages decompressed the total number of pages that have been decompressed by the VM compressor. Pages compressed the total number of pages that have been compressed by the VM compressor. Pageins the total number of requests for pages from a pager (such as the inode pager). Pageouts the total number of pages that have been paged out. Swapins the total number of compressed pages that have been swapped out to disk. Swapouts the total number of compressed pages that have been swapped back in from disk. Ifintervalis not specified, thenvm_statdisplays all accumulated sta- tistics along with the page size. Mac OS X August 13, 1997 Mac OS X

Mac OS X 10.9 - Generated Sun Oct 13 13:27:09 CDT 2013