1.\" Copyright (c) 1989, 1990, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. Neither the name of the University nor the names of its contributors 13.\" may be used to endorse or promote products derived from this software 14.\" without specific prior written permission. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 17.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 20.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26.\" SUCH DAMAGE. 27.\" 28.\" From: @(#)nfsstat.1 8.1 (Berkeley) 6/6/93 29.\" 30.Dd June 5, 2023 31.Dt NFSSTAT 1 32.Os 33.Sh NAME 34.Nm nfsstat 35.Nd display 36.Tn NFS 37statistics 38.Sh SYNOPSIS 39.Nm 40.Op Fl -libxo 41.Op Fl cdEemszW 42.Op Fl w Ar wait 43.Sh DESCRIPTION 44The 45.Nm 46command displays statistics kept about 47.Tn NFS 48client and server activity. 49For the NFSv4 server, the statistics are for operations within the Compound 50RPCs and not the count of RPCs. 51If you wish to compare RPC counts between NFSv3 and NFSv4, you must use 52statistics in the client(s). 53.Pp 54The options are as follows: 55.Bl -tag -width "-w wait" 56.It Fl c 57Only display client side statistics. 58.It Fl d 59Display statistics for the NFS server that are similar to those 60displayed by 61.Xr iostat 8 . 62This includes kilobytes per transfer, transfers per second, and megabytes per 63second for read, write, and all operations. 64It also includes the current queue depth, the busy percentage, and latency 65for all operations. 66If the 67.Fl W 68flag is added, commits per second, commit latency, read latency, and write 69latency are also added to the display. 70The busy percentage shown can exceed 100 at times. 71This is because of the way busy percentages are calculated. 72The busy time is calculated by adding the elapsed time between the 73last time an operation started or finished, 74and the current time. 75If there is only one operation outstanding, the "busy time" time 76will get updated with the total time of that operation. 77That means that the difference in the busy time between the two 78measurement intervals (often 1 second) 79will increase by more than the measurement interval. 80.It Fl e 81Report the extra statistics collected by the NFS client and 82server for NFSv4. 83.It Fl E 84Similar to 85.Fl e 86except that the statistics include NFSv4.1 and NFSv4.2 and the numbers aren't 87clipped at one billion. 88Only one of 89.Fl e 90or 91.Fl E 92can be specified. 93.It Fl M 94Deprecated and ignored. 95.It Fl m 96Report the mount options for all NFS client mounts. 97This option overrides all others and 98.Nm 99will exit after completing the report. 100.It Fl N 101Deprecated and ignored. 102.It Fl s 103Only display server side statistics. 104.It Fl W 105Use wide format with interval short summary. 106This option is especially 107useful when combined with 108.Fl c , 109.Fl d , 110or 111.Fl s 112and a time delay. 113.It Fl w Ar wait 114Display a shorter summary of 115.Tn NFS 116activity for both the client and server at 117.Ar wait 118second intervals. 119.It Fl z 120Reset statistics after displaying them. 121.It Fl q 122Do not print header 123.It Fl -libxo 124Generate output via 125.Xr libxo 3 126in a selection of different human and machine readable formats. 127See 128.Xr xo_parse_args 3 129for details on command line arguments. 130.El 131.Sh SEE ALSO 132.Xr fstat 1 , 133.Xr netstat 1 , 134.Xr ps 1 , 135.Xr systat 1 , 136.Xr sysctl 3 , 137.Xr iostat 8 , 138.Xr nfsdumpstate 8 , 139.Xr pstat 8 , 140.Xr vmstat 8 141.Sh HISTORY 142The 143.Nm 144command appeared in 145.Bx 4.4 . 146