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.Dd December 28, 2023 29.Dt NFSSTAT 1 30.Os 31.Sh NAME 32.Nm nfsstat 33.Nd display 34.Tn NFS 35statistics 36.Sh SYNOPSIS 37.Nm 38.Op Fl -libxo 39.Op Fl cdEemqszW 40.Op Fl w Ar wait 41.Sh DESCRIPTION 42The 43.Nm 44command displays statistics kept about 45.Tn NFS 46client and server activity. 47For the NFSv4 server, the statistics are for operations within the Compound 48RPCs and not the count of RPCs. 49If you wish to compare RPC counts between NFSv3 and NFSv4, you must use 50statistics in the client(s). 51.Pp 52The options are as follows: 53.Bl -tag -width "-w wait" 54.It Fl c 55Only display client side statistics. 56.It Fl d 57Display statistics for the NFS server that are similar to those 58displayed by 59.Xr iostat 8 . 60This includes kilobytes per transfer, transfers per second, and megabytes per 61second for read, write, and all operations. 62It also includes the current queue depth, the busy percentage, and latency 63for all operations. 64If the 65.Fl W 66flag is added, commits per second, commit latency, read latency, and write 67latency are also added to the display. 68The busy percentage shown can exceed 100 at times. 69This is because of the way busy percentages are calculated. 70The busy time is calculated by adding the elapsed time between the 71last time an operation started or finished, 72and the current time. 73If there is only one operation outstanding, the "busy time" time 74will get updated with the total time of that operation. 75That means that the difference in the busy time between the two 76measurement intervals (often 1 second) 77will increase by more than the measurement interval. 78.It Fl e 79Report the extra statistics collected by the NFS client and 80server for NFSv4. 81.It Fl E 82Similar to 83.Fl e 84except that the statistics include NFSv4.1 and NFSv4.2 and the numbers aren't 85clipped at one billion. 86Only one of 87.Fl e 88or 89.Fl E 90can be specified. 91.It Fl M 92Deprecated and ignored. 93.It Fl m 94Report the mount options for all NFS client mounts. 95This option overrides all others and 96.Nm 97will exit after completing the report. 98.It Fl N 99Deprecated and ignored. 100.It Fl s 101Only display server side statistics. 102.It Fl W 103Use wide format with interval short summary. 104This option is especially 105useful when combined with 106.Fl c , 107.Fl d , 108or 109.Fl s 110and a time delay. 111.It Fl w Ar wait 112Display a shorter summary of 113.Tn NFS 114activity for both the client and server at 115.Ar wait 116second intervals. 117.It Fl z 118Reset statistics after displaying them. 119.It Fl q 120Do not print headers. 121.It Fl -libxo 122Generate output via 123.Xr libxo 3 124in a selection of different human and machine readable formats. 125See 126.Xr xo_parse_args 3 127for details on command line arguments. 128.El 129.Sh SEE ALSO 130.Xr fstat 1 , 131.Xr netstat 1 , 132.Xr ps 1 , 133.Xr systat 1 , 134.Xr sysctl 3 , 135.Xr iostat 8 , 136.Xr nfsdumpstate 8 , 137.Xr pstat 8 , 138.Xr vmstat 8 139.Sh HISTORY 140The 141.Nm 142command appeared in 143.Bx 4.4 . 144