Update vmstat portion of man page to reflect the statistics currently
shown by systat's vmstat display. PR: docs/3764
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Notes:
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2020-12-20 02:59:44 +00:00
svn path=/head/; revision=37159
@ -286,7 +286,12 @@ average number of processes (over the last refresh interval)
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that are runnable (`r'), in page wait (`p'),
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in disk wait other than paging (`d'),
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sleeping (`s'), and swapped out but desiring to run (`w').
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Below the queue length listing is a numerical listing and
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The row also shows the average number of context switches
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(`Csw'), traps (`Trp'; includes page faults), system calls (`Sys'),
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interrupts (`Int'), network software interrupts (`Sof'), and page
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faults (`Flt').
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.Pp
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Below the process queue length listing is a numerical listing and
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a bar graph showing the amount of
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system (shown as `='), interrupt (shown as `+'), user (shown as `>'),
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nice (shown as `-'), and idle time (shown as ` ').
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@ -323,41 +328,31 @@ number of disk transfers per second over the last refresh interval;
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the second row of the display shows the average
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number of pages transferred per second over the last refresh interval.
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.Pp
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Below the paging statistics is a line listing the average number of
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total reclaims ('Rec'),
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intransit blocking page faults (`It'),
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swap text pages found in free list (`F/S'),
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file system text pages found in free list (`F/F'),
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reclaims from free list
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pages freed by the clock daemon (`Fre'),
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and sequential process pages freed (`SFr')
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Below the paging statistics is a column of lines regarding the virtual
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memory system which list the average number of
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pages copied on write (`cow'),
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pages zero filled on demand (`zfod'),
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pages wired down (`wire'),
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active pages (`act'),
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inactive pages (`inact'),
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pages on the buffer cache queue (`cache'),
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number of free pages (`free'),
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pages freed by the page daemon (`daefr'),
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pages freed by exiting processes (`prcfr'),
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pages reactivated from the free list (`react'),
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times the page daemon was awakened (`pdwak'),
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pages analyzed by the page daemon (`pdpgs'),
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and
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intransit blocking page faults (`intrn')
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per second over the refresh interval.
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.Pp
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Below this line are statistics on the average number of
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zero filled pages (`zf') and demand filled text pages (`xf')
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per second over the refresh period.
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The first row indicates the number of requests that were
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resolved, the second row shows the number that were set up,
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and the last row shows the percentage of setup requests that were
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actually used.
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Note that this percentage is usually less than 100%,
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however it may exceed 100% if a large number of requests
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are actually used long after they were set up during a
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period when no new pages are being set up.
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Thus this figure is most interesting when observed over
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a long time period, such as from boot time
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(see below on getting such a display).
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.Pp
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Below the page fill statistics is a column that
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lists the average number of context switches (`Csw'),
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traps (`Trp'; includes page faults), system calls (`Sys'), interrupts (`Int'),
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characters output to DZ ports using
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.No pseudo Ns -DMA
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(`Pdm'),
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network software interrupts (`Sof'),
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page faults (`Flt'), pages scanned by the page daemon (`Scn'),
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and revolutions of the page daemon's hand (`Rev')
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per second over the refresh interval.
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At the bottom of this column are lines showing the
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amount of memory, in kilobytes, used for the buffer cache (`buf'),
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desired maximum size of vnode cache (`desiredvnodes') (mostly unused,
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except to size the name cache),
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number of vnodes actually allocated (`numvnodes'),
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and
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number of allocated vnodes that are free (`freevnodes').
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.Pp
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Running down the right hand side of the display is a breakdown
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of the interrupts being handled by the system.
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