Manual Page Result
0
Command: vmstat | Section: 8 | Source: UNIX v10 | File: vmstat.8
VMSTAT(8) System Manager's Manual VMSTAT(8)
NAME
vmstat - report virtual memory statistics
SYNOPSIS
vmstat [ -st ] [ interval [ count ] ]
DESCRIPTION
Vmstat reports statistics about certain system activity. Option -s
prints totals for miscellaneous events since the last boot. Option -t
reports on paging events.
In the absence of other options, the optional interval argument causes
vmstat to report once each interval seconds, repeated count times or
forever.
The default format fields are:
procs information about numbers of processes in various states:
r in run queue
b blocked for resources (I/O, paging, etc.)
w runnable or short sleeper (< 20 secs) but swapped
memory use of virtual and real memory:
avm number of pages belonging to processes that have run in
the last 20 seconds
fre size of memory free list
page paging activity, averaged each five seconds, in units per sec-
ond:
re page reclaims (simulating reference bits)
at text pages recovered from memory
pi page-in events
po page-out events
fr pages freed per second
de anticipated short term memory shortfall
sr scan rate: pageout daemon rpm
faults trap rates, averaged each five seconds, in units per second:
sy system calls
cs process context switches
cpu percentage use of CPU time:
us user time, both normal and low priority
sy system time
id cpu idle time
st stream queue processing time
FILES
BUGS
This program is never up to date.
VMSTAT(8)