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Update vmstat portion of man page to reflect the statistics currently

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shown by systat's vmstat display.
PR:		docs/3764
This commit is contained in:
Guy Helmer 1998-06-25 22:04:48 +00:00
parent 021e3d59aa
commit a57a22d25f
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=37159
1 changed files with 29 additions and 34 deletions
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usr.bin/systat/systat.1
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@ -286,7 +286,12 @@ average number of processes (over the last refresh interval)
that are runnable (`r'), in page wait (`p'),
in disk wait other than paging (`d'),
sleeping (`s'), and swapped out but desiring to run (`w').
Below the queue length listing is a numerical listing and
The row also shows the average number of context switches
(`Csw'), traps (`Trp'; includes page faults), system calls (`Sys'),
interrupts (`Int'), network software interrupts (`Sof'), and page
faults (`Flt').
.Pp
Below the process queue length listing is a numerical listing and
a bar graph showing the amount of
system (shown as `='), interrupt (shown as `+'), user (shown as `>'),
nice (shown as `-'), and idle time (shown as ` ').
@ -323,41 +328,31 @@ number of disk transfers per second over the last refresh interval;
the second row of the display shows the average
number of pages transferred per second over the last refresh interval.
.Pp
Below the paging statistics is a line listing the average number of
total reclaims ('Rec'),
intransit blocking page faults (`It'),
swap text pages found in free list (`F/S'),
file system text pages found in free list (`F/F'),
reclaims from free list
pages freed by the clock daemon (`Fre'),
and sequential process pages freed (`SFr')
Below the paging statistics is a column of lines regarding the virtual
memory system which list the average number of
pages copied on write (`cow'),
pages zero filled on demand (`zfod'),
pages wired down (`wire'),
active pages (`act'),
inactive pages (`inact'),
pages on the buffer cache queue (`cache'),
number of free pages (`free'),
pages freed by the page daemon (`daefr'),
pages freed by exiting processes (`prcfr'),
pages reactivated from the free list (`react'),
times the page daemon was awakened (`pdwak'),
pages analyzed by the page daemon (`pdpgs'),
and
intransit blocking page faults (`intrn')
per second over the refresh interval.
.Pp
Below this line are statistics on the average number of
zero filled pages (`zf') and demand filled text pages (`xf')
per second over the refresh period.
The first row indicates the number of requests that were
resolved, the second row shows the number that were set up,
and the last row shows the percentage of setup requests that were
actually used.
Note that this percentage is usually less than 100%,
however it may exceed 100% if a large number of requests
are actually used long after they were set up during a
period when no new pages are being set up.
Thus this figure is most interesting when observed over
a long time period, such as from boot time
(see below on getting such a display).
.Pp
Below the page fill statistics is a column that
lists the average number of context switches (`Csw'),
traps (`Trp'; includes page faults), system calls (`Sys'), interrupts (`Int'),
characters output to DZ ports using
.No pseudo Ns -DMA
(`Pdm'),
network software interrupts (`Sof'),
page faults (`Flt'), pages scanned by the page daemon (`Scn'),
and revolutions of the page daemon's hand (`Rev')
per second over the refresh interval.
At the bottom of this column are lines showing the
amount of memory, in kilobytes, used for the buffer cache (`buf'),
desired maximum size of vnode cache (`desiredvnodes') (mostly unused,
except to size the name cache),
number of vnodes actually allocated (`numvnodes'),
and
number of allocated vnodes that are free (`freevnodes').
.Pp
Running down the right hand side of the display is a breakdown
of the interrupts being handled by the system.