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.\" 4. 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 August 13, 2016 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 cdemszW 42.Op Fl M Ar core 43.Op Fl N Ar system 44.Op Fl w Ar wait 45.Sh DESCRIPTION 46The 47.Nm 48command displays statistics kept about 49.Tn NFS 50client and server activity. 51For the NFSv4 server, the statistics are for operations within the Compound 52RPCs and not the count of RPCs. 53If you wish to compare RPC counts between NFSv3 and NFSv4, you must use 54statistics in the client(s). 55.Pp 56The options are as follows: 57.Bl -tag -width indent 58.It Fl c 59Only display client side statistics. 60.It Fl d 61Display statistics for the new NFS server that are similar to those 62displayed by 63.Xr iostat 8 . 64This includes kilobytes per transfer, transfers per second, and megabytes per 65second for read, write, and all operations. 66It also includes the current queue depth, the busy percentage, and latency 67for all operations. 68If the 69.Fl W 70flag is added, commits per second, commit latency, read latency, and write 71latency are also added to the display. 72The busy percentage shown can exceed 100 at times. 73This is because of the way busy percentages are calculated. 74The busy time is calculated by adding the elapsed time between the 75last time an operation started or finished, 76and the current time. 77If there is only one operation outstanding, the "busy time" time 78will get updated with the total time of that operation. 79That means that the difference in the busy time between the two 80measurement intervals (often 1 second) 81will increase by more than the measurement interval. 82.It Fl e 83Report the extra statistics collected by the NFS client and 84server for NFSv4. 85.It Fl M 86Extract values associated with the name list from the specified core 87instead of the default 88.Pa /dev/kmem . 89.It Fl m 90Report the mount options for all new NFS client mounts. 91This option overrides all others and 92.Nm 93will exit after completing the report. 94This option is only supported by the new NFS client. 95.It Fl N 96Extract the name list from the specified system instead of the default 97.Pa /boot/kernel/kernel . 98.It Fl s 99Only display server side statistics. 100.It Fl W 101Use wide format with interval short summary. 102This option is especially 103useful when combined with 104.Fl c , 105.Fl d , 106or 107.Fl s 108and a time delay. 109.It Fl w 110Display a shorter summary of 111.Tn NFS 112activity for both the client and server at 113.Ar wait 114second intervals. 115.It Fl z 116Reset statistics after displaying them. 117.El 118.Sh FILES 119.Bl -tag -width ".Pa /boot/kernel/kernel" -compact 120.It Pa /boot/kernel/kernel 121default kernel namelist 122.It Pa /dev/kmem 123default memory file 124.El 125.Sh SEE ALSO 126.Xr fstat 1 , 127.Xr netstat 1 , 128.Xr ps 1 , 129.Xr systat 1 , 130.Xr sysctl 3 , 131.Xr iostat 8 , 132.Xr nfsdumpstate 8 , 133.Xr pstat 8 , 134.Xr vmstat 8 135.Sh HISTORY 136The 137.Nm 138command appeared in 139.Bx 4.4 . 140