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 October 1, 2018 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 M Ar core 44.Op Fl N Ar system 45.Op Fl w Ar wait 46.Sh DESCRIPTION 47The 48.Nm 49command displays statistics kept about 50.Tn NFS 51client and server activity. 52For the NFSv4 server, the statistics are for operations within the Compound 53RPCs and not the count of RPCs. 54If you wish to compare RPC counts between NFSv3 and NFSv4, you must use 55statistics in the client(s). 56.Pp 57The options are as follows: 58.Bl -tag -width indent 59.It Fl c 60Only display client side statistics. 61.It Fl d 62Display statistics for the NFS server that are similar to those 63displayed by 64.Xr iostat 8 . 65This includes kilobytes per transfer, transfers per second, and megabytes per 66second for read, write, and all operations. 67It also includes the current queue depth, the busy percentage, and latency 68for all operations. 69If the 70.Fl W 71flag is added, commits per second, commit latency, read latency, and write 72latency are also added to the display. 73The busy percentage shown can exceed 100 at times. 74This is because of the way busy percentages are calculated. 75The busy time is calculated by adding the elapsed time between the 76last time an operation started or finished, 77and the current time. 78If there is only one operation outstanding, the "busy time" time 79will get updated with the total time of that operation. 80That means that the difference in the busy time between the two 81measurement intervals (often 1 second) 82will increase by more than the measurement interval. 83.It Fl e 84Report the extra statistics collected by the NFS client and 85server for NFSv4. 86.It Fl E 87Similar to 88.Fl e 89except that the statistics include NFSv4.1 and the numbers aren't clipped 90at one billion. 91Only one of 92.Fl e 93or 94.Fl E 95can be specified. 96.It Fl M 97Extract values associated with the name list from the specified core 98instead of the default 99.Pa /dev/kmem . 100.It Fl m 101Report the mount options for all NFS client mounts. 102This option overrides all others and 103.Nm 104will exit after completing the report. 105.It Fl N 106Extract the name list from the specified system instead of the default 107.Pa /boot/kernel/kernel . 108.It Fl s 109Only display server side statistics. 110.It Fl W 111Use wide format with interval short summary. 112This option is especially 113useful when combined with 114.Fl c , 115.Fl d , 116or 117.Fl s 118and a time delay. 119.It Fl w 120Display a shorter summary of 121.Tn NFS 122activity for both the client and server at 123.Ar wait 124second intervals. 125.It Fl z 126Reset statistics after displaying them. 127.It Fl q 128Do not print header 129.It Fl -libxo 130Generate output via 131.Xr libxo 3 132in a selection of different human and machine readable formats. 133See 134.Xr xo_parse_args 3 135for details on command line arguments. 136.El 137.Sh FILES 138.Bl -tag -width ".Pa /boot/kernel/kernel" -compact 139.It Pa /boot/kernel/kernel 140default kernel namelist 141.It Pa /dev/kmem 142default memory file 143.El 144.Sh SEE ALSO 145.Xr fstat 1 , 146.Xr netstat 1 , 147.Xr ps 1 , 148.Xr systat 1 , 149.Xr sysctl 3 , 150.Xr iostat 8 , 151.Xr nfsdumpstate 8 , 152.Xr pstat 8 , 153.Xr vmstat 8 154.Sh HISTORY 155The 156.Nm 157command appeared in 158.Bx 4.4 . 159