287 lines
8.3 KiB
Groff
287 lines
8.3 KiB
Groff
.\" $NetBSD: vmstat.1,v 1.8 2002/11/07 13:40:16 enami Exp $
|
|
.\"
|
|
.\" Copyright (c) 2000 The NetBSD Foundation, Inc.
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\" 3. All advertising materials mentioning features or use of this software
|
|
.\" must display the following acknowledgement:
|
|
.\" This product includes software developed by the NetBSD
|
|
.\" Foundation, Inc. and its contributors.
|
|
.\" 4. Neither the name of The NetBSD Foundation nor the names of its
|
|
.\" contributors may be used to endorse or promote products derived
|
|
.\" from this software without specific prior written permission.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
|
|
.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
|
.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
|
|
.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
.\" POSSIBILITY OF SUCH DAMAGE.
|
|
.\"
|
|
.\" Copyright (c) 1986, 1993
|
|
.\" The Regents of the University of California. All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\" 3. All advertising materials mentioning features or use of this software
|
|
.\" must display the following acknowledgement:
|
|
.\" This product includes software developed by the University of
|
|
.\" California, Berkeley and its contributors.
|
|
.\" 4. Neither the name of the University nor the names of its contributors
|
|
.\" may be used to endorse or promote products derived from this software
|
|
.\" without specific prior written permission.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" @(#)vmstat.8 8.1 (Berkeley) 6/6/93
|
|
.\"
|
|
.Dd November 26, 2001
|
|
.Dt VMSTAT 1
|
|
.Os
|
|
.Sh NAME
|
|
.Nm vmstat
|
|
.Nd report virtual memory statistics
|
|
.Sh SYNOPSIS
|
|
.Nm ""
|
|
.Op Fl efHilLmsUv
|
|
.Bk -words
|
|
.Op Fl M Ar core
|
|
.Ek
|
|
.Bk -words
|
|
.Op Fl N Ar system
|
|
.Ek
|
|
.Bk -words
|
|
.Op Fl c Ar count
|
|
.Ek
|
|
.Bk -words
|
|
.Op Fl h Ar hashname
|
|
.Ek
|
|
.Bk -words
|
|
.Op Fl u Ar histname
|
|
.Ek
|
|
.Bk -words
|
|
.Op Fl w Ar wait
|
|
.Ek
|
|
.Op Ar disks
|
|
.Sh DESCRIPTION
|
|
.Nm
|
|
reports certain kernel statistics kept about process, virtual memory,
|
|
disk, trap and cpu activity.
|
|
.Pp
|
|
The options are as follows:
|
|
.Bl -tag -width xxxhistname
|
|
.It Fl M Ar core
|
|
Extract values associated with the name list from the specified core
|
|
instead of the default
|
|
.Pa /dev/mem .
|
|
.It Fl N Ar system
|
|
Extract the name list from the specified system instead of the default
|
|
.Pa /netbsd .
|
|
.It Fl c Ar count
|
|
Repeat the display
|
|
.Ar count
|
|
times.
|
|
The first display is for the time since a reboot and each subsequent report
|
|
is for the time period since the last display.
|
|
If no
|
|
.Ar wait
|
|
interval is specified, the default is 1 second.
|
|
.It Fl e
|
|
Report the values of system event counters.
|
|
.It Fl f
|
|
Report fork statistics.
|
|
.It Fl h Ar hashname
|
|
Report hash table statistics for
|
|
.Ar hashname .
|
|
.It Fl H
|
|
Report all hash table statistics.
|
|
.It Fl i
|
|
Report the values of system interrupt counters.
|
|
.It Fl l
|
|
List the UVM histories being maintained by the kernel.
|
|
.It Fl L
|
|
List all the hashes supported for
|
|
.Fl h
|
|
and
|
|
.Fl H .
|
|
.It Fl m
|
|
Report on the usage of kernel dynamic memory listed first by size of
|
|
allocation and then by type of usage.
|
|
.It Fl s
|
|
Display the contents of the
|
|
.Dv uvmexp
|
|
structure.
|
|
This contains various paging event and memory status counters.
|
|
.It Fl u Ar histname
|
|
Dump the specified UVM history.
|
|
.It Fl U
|
|
Dump all UVM histories.
|
|
.It Fl v
|
|
Print more verbose information.
|
|
When used with the
|
|
.Fl i
|
|
or
|
|
.Fl e
|
|
options, prints out all interrupts or event counters, not just those with
|
|
non-zero values.
|
|
.It Fl w Ar wait
|
|
Pause
|
|
.Ar wait
|
|
seconds between each display.
|
|
If no repeat
|
|
.Ar count
|
|
is specified, the default is infinity.
|
|
.El
|
|
.Pp
|
|
By default,
|
|
.Nm
|
|
displays the following information:
|
|
.Pp
|
|
.Bl -tag -width memory
|
|
.It procs
|
|
Information about the numbers of processes in various states.
|
|
.Pp
|
|
.Bl -tag -width abcd -compact
|
|
.It r
|
|
in run queue
|
|
.It b
|
|
blocked for resources (i/o, paging, etc.)
|
|
.It w
|
|
runnable or short sleeper (\*[Lt] 20 secs) but swapped
|
|
.El
|
|
.It memory
|
|
Information about the usage of virtual and real memory.
|
|
Virtual pages (reported in units of 1024 bytes) are considered active if
|
|
they belong to processes which are running or have run in the last 20
|
|
seconds.
|
|
.Pp
|
|
.Bl -tag -width abcd -compact
|
|
.It avm
|
|
active virtual pages
|
|
.It fre
|
|
size of the free list
|
|
.El
|
|
.It page
|
|
Information about page faults and paging activity.
|
|
These are averaged every five seconds, and given in units per second.
|
|
.Pp
|
|
.Bl -tag -width abcd -compact
|
|
.It flt
|
|
total page faults
|
|
.It re
|
|
page reclaims (simulating reference bits)
|
|
.It pi
|
|
pages paged in
|
|
.It po
|
|
pages paged out
|
|
.It fr
|
|
pages freed per second
|
|
.It sr
|
|
pages scanned by clock algorithm, per-second
|
|
.El
|
|
.It disks
|
|
Disk transfers per second.
|
|
Typically paging will be split across the available drives.
|
|
The header of the field is the first character of the disk name and
|
|
the unit number.
|
|
If more than four disk drives are configured in the system,
|
|
.Nm
|
|
displays only the first four drives.
|
|
To force
|
|
.Nm
|
|
to display specific drives, their names may be supplied on the command line.
|
|
.It faults
|
|
Trap/interrupt rate averages per second over last 5 seconds.
|
|
.Pp
|
|
.Bl -tag -width abcd -compact
|
|
.It in
|
|
device interrupts per interval (including clock interrupts)
|
|
.It sy
|
|
system calls per interval
|
|
.It cs
|
|
cpu context switch rate (switches/interval)
|
|
.El
|
|
.It cpu
|
|
Breakdown of percentage usage of CPU time.
|
|
.Pp
|
|
.Bl -tag -width abcd -compact
|
|
.It us
|
|
user time for normal and low priority processes
|
|
.It sy
|
|
system time
|
|
.It id
|
|
cpu idle
|
|
.El
|
|
.El
|
|
.Sh FILES
|
|
.Bl -tag -width eeenymeeny -compact
|
|
.It Pa /netbsd
|
|
default kernel namelist
|
|
.It Pa /dev/mem
|
|
default memory file
|
|
.El
|
|
.Sh EXAMPLES
|
|
The command
|
|
.Dq Li vmstat -w 5
|
|
will print what the system is doing every five
|
|
seconds; this is a good choice of printing interval since this is how often
|
|
some of the statistics are sampled in the system.
|
|
Others vary every second and running the output for a while will make it
|
|
apparent which are recomputed every second.
|
|
.Sh SEE ALSO
|
|
.Xr fstat 1 ,
|
|
.Xr netstat 1 ,
|
|
.Xr nfsstat 1 ,
|
|
.Xr ps 1 ,
|
|
.Xr systat 1 ,
|
|
.Xr iostat 8 ,
|
|
.Xr pstat 8
|
|
.Pp
|
|
The sections starting with
|
|
.Dq Interpreting system activity
|
|
in
|
|
.%T Installing and Operating 4.3BSD .
|
|
.Sh BUGS
|
|
The
|
|
.Fl c
|
|
and
|
|
.Fl w
|
|
options are only available with the default output.
|
|
.Pp
|
|
The
|
|
.Fl l ,
|
|
.Fl u ,
|
|
and
|
|
.Fl U
|
|
options are useful only if the system was compiled with support for UVM
|
|
history.
|