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.\" $FreeBSD$ 30.\" 31.Dd June 5, 2023 32.Dt NFSSTAT 1 33.Os 34.Sh NAME 35.Nm nfsstat 36.Nd display 37.Tn NFS 38statistics 39.Sh SYNOPSIS 40.Nm 41.Op Fl -libxo 42.Op Fl cdEemszW 43.Op Fl w Ar wait 44.Sh DESCRIPTION 45The 46.Nm 47command displays statistics kept about 48.Tn NFS 49client and server activity. 50For the NFSv4 server, the statistics are for operations within the Compound 51RPCs and not the count of RPCs. 52If you wish to compare RPC counts between NFSv3 and NFSv4, you must use 53statistics in the client(s). 54.Pp 55The options are as follows: 56.Bl -tag -width "-w wait" 57.It Fl c 58Only display client side statistics. 59.It Fl d 60Display statistics for the NFS server that are similar to those 61displayed by 62.Xr iostat 8 . 63This includes kilobytes per transfer, transfers per second, and megabytes per 64second for read, write, and all operations. 65It also includes the current queue depth, the busy percentage, and latency 66for all operations. 67If the 68.Fl W 69flag is added, commits per second, commit latency, read latency, and write 70latency are also added to the display. 71The busy percentage shown can exceed 100 at times. 72This is because of the way busy percentages are calculated. 73The busy time is calculated by adding the elapsed time between the 74last time an operation started or finished, 75and the current time. 76If there is only one operation outstanding, the "busy time" time 77will get updated with the total time of that operation. 78That means that the difference in the busy time between the two 79measurement intervals (often 1 second) 80will increase by more than the measurement interval. 81.It Fl e 82Report the extra statistics collected by the NFS client and 83server for NFSv4. 84.It Fl E 85Similar to 86.Fl e 87except that the statistics include NFSv4.1 and NFSv4.2 and the numbers aren't 88clipped at one billion. 89Only one of 90.Fl e 91or 92.Fl E 93can be specified. 94.It Fl M 95Deprecated and ignored. 96.It Fl m 97Report the mount options for all NFS client mounts. 98This option overrides all others and 99.Nm 100will exit after completing the report. 101.It Fl N 102Deprecated and ignored. 103.It Fl s 104Only display server side statistics. 105.It Fl W 106Use wide format with interval short summary. 107This option is especially 108useful when combined with 109.Fl c , 110.Fl d , 111or 112.Fl s 113and a time delay. 114.It Fl w Ar wait 115Display a shorter summary of 116.Tn NFS 117activity for both the client and server at 118.Ar wait 119second intervals. 120.It Fl z 121Reset statistics after displaying them. 122.It Fl q 123Do not print header 124.It Fl -libxo 125Generate output via 126.Xr libxo 3 127in a selection of different human and machine readable formats. 128See 129.Xr xo_parse_args 3 130for details on command line arguments. 131.El 132.Sh SEE ALSO 133.Xr fstat 1 , 134.Xr netstat 1 , 135.Xr ps 1 , 136.Xr systat 1 , 137.Xr sysctl 3 , 138.Xr iostat 8 , 139.Xr nfsdumpstate 8 , 140.Xr pstat 8 , 141.Xr vmstat 8 142.Sh HISTORY 143The 144.Nm 145command appeared in 146.Bx 4.4 . 147