150 lines
4.5 KiB
Groff
150 lines
4.5 KiB
Groff
.\" Copyright (c) 1989, 1990, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" From: @(#)nfsstat.1 8.1 (Berkeley) 6/6/93
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.\" $FreeBSD$
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.\"
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.Dd November 23, 2016
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.Dt NFSSTAT 1
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.Os
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.Sh NAME
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.Nm nfsstat
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.Nd display
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.Tn NFS
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statistics
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.Sh SYNOPSIS
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.Nm
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.Op Fl cdEemszW
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.Op Fl M Ar core
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.Op Fl N Ar system
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.Op Fl w Ar wait
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.Sh DESCRIPTION
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The
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.Nm
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command displays statistics kept about
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.Tn NFS
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client and server activity.
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For the NFSv4 server, the statistics are for operations within the Compound
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RPCs and not the count of RPCs.
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If you wish to compare RPC counts between NFSv3 and NFSv4, you must use
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statistics in the client(s).
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.Pp
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The options are as follows:
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.Bl -tag -width indent
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.It Fl c
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Only display client side statistics.
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.It Fl d
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Display statistics for the new NFS server that are similar to those
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displayed by
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.Xr iostat 8 .
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This includes kilobytes per transfer, transfers per second, and megabytes per
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second for read, write, and all operations.
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It also includes the current queue depth, the busy percentage, and latency
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for all operations.
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If the
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.Fl W
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flag is added, commits per second, commit latency, read latency, and write
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latency are also added to the display.
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The busy percentage shown can exceed 100 at times.
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This is because of the way busy percentages are calculated.
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The busy time is calculated by adding the elapsed time between the
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last time an operation started or finished,
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and the current time.
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If there is only one operation outstanding, the "busy time" time
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will get updated with the total time of that operation.
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That means that the difference in the busy time between the two
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measurement intervals (often 1 second)
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will increase by more than the measurement interval.
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.It Fl e
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Report the extra statistics collected by the NFS client and
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server for NFSv4.
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.It Fl E
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Similar to
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.Fl e
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except that the statistics include NFSv4.1 and the numbers aren't clipped
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at one billion.
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Only one of
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.Fl e
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or
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.Fl E
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can be specified.
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.It Fl M
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Extract values associated with the name list from the specified core
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instead of the default
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.Pa /dev/kmem .
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.It Fl m
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Report the mount options for all new NFS client mounts.
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This option overrides all others and
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.Nm
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will exit after completing the report.
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This option is only supported by the new NFS client.
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.It Fl N
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Extract the name list from the specified system instead of the default
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.Pa /boot/kernel/kernel .
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.It Fl s
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Only display server side statistics.
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.It Fl W
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Use wide format with interval short summary.
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This option is especially
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useful when combined with
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.Fl c ,
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.Fl d ,
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or
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.Fl s
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and a time delay.
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.It Fl w
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Display a shorter summary of
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.Tn NFS
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activity for both the client and server at
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.Ar wait
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second intervals.
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.It Fl z
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Reset statistics after displaying them.
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.El
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.Sh FILES
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.Bl -tag -width ".Pa /boot/kernel/kernel" -compact
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.It Pa /boot/kernel/kernel
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default kernel namelist
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.It Pa /dev/kmem
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default memory file
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.El
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.Sh SEE ALSO
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.Xr fstat 1 ,
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.Xr netstat 1 ,
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.Xr ps 1 ,
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.Xr systat 1 ,
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.Xr sysctl 3 ,
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.Xr iostat 8 ,
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.Xr nfsdumpstate 8 ,
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.Xr pstat 8 ,
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.Xr vmstat 8
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.Sh HISTORY
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The
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.Nm
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command appeared in
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.Bx 4.4 .
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