80a1b8c5e3
r356242 updated nfsstat.c to report that the "-M" and "-N" options were being ignored. These options have never had any meaning for the new NFS code (which is now the only NFS code). This patch updates the man page to reflect this. This is a content change.
147 lines
4.3 KiB
Groff
147 lines
4.3 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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.\" 3. 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 December 31, 2019
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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 -libxo
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.Op Fl cdEemszW
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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 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 NFSv4.2 and the numbers aren't
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clipped 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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Deprecated and ignored.
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.It Fl m
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Report the mount options for all 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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.It Fl N
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Deprecated and ignored.
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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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.It Fl q
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Do not print header
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.It Fl -libxo
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Generate output via
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.Xr libxo 3
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in a selection of different human and machine readable formats.
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See
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.Xr xo_parse_args 3
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for details on command line arguments.
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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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