man > nfsstat(8)

nfsstat(8)                             System Manager's Manual                            nfsstat(8)

NAME
       nfsstat - list NFS statistics

SYNOPSIS
       nfsstat [OPTION]...

DESCRIPTION
       The nfsstat displays statistics kept about NFS client and server activity.

OPTIONS
       -s, --server
              Print only server-side statistics. The default is to print both server and client sta‐
              tistics.

       -c, --client
              Print only client-side statistics.

       -n, --nfs
              Print only NFS statistics. The default is to print both NFS and RPC information.

       -2     Print  only NFS v2 statistics. The default is to only print information about the ver‐
              sions of NFS that have non-zero counts.

       -3     Print only NFS v3 statistics. The default is to only print information about the  ver‐
              sions of NFS that have non-zero counts.

       -4     Print  only NFS v4 statistics. The default is to only print information about the ver‐
              sions of NFS that have non-zero counts.

       -m, --mounts
              Print information about each of the mounted NFS file systems.

              If this option is used, all other options are ignored.

       -r, --rpc
              Print only RPC statistics.

       -o facility
              Display statistics for the specified facility, which must be one of:

              nfs    NFS protocol information, split up by RPC call.

              rpc    General RPC information.

              net    Network layer statistics, such as the number of received packets, number of TCP
                     connections, etc.

              fh     Usage information on the server's file handle cache, including the total number
                     of lookups, and the number of hits and misses.

              rc     Usage information on the server's request reply cache, including the total num‐
                     ber of lookups, and the number of hits and misses.

              io     Usage information on the server's io statistics; bytes read and written.

              ra     Usage information on the server's read ahead  cache,  including  the  ra  cache
                     size, the depth of ra cache hits, and ra cache misses.

              all    Display all of the above facilities.

       -v, --verbose
              This is equivalent to -o all.

       -l, --list
              Print information in list form.

       -S, --since file
              Instead  of printing current statistics, nfsstat imports statistics from file and dis‐
              plays the difference between those and the current statistics.  Valid input files  may
              be in the form of /proc/net/rpc/nfs (raw client stats), /proc/net/rpc/nfsd (raw server
              stats),  or  saved output from nfsstat itself (client and/or server stats).   Any sta‐
              tistics missing from a saved nfsstat output file are treated as zeroes.

       -Z[interval], --sleep=[interval]
              Instead of printing current statistics and immediately exiting, nfsstat takes a  snap‐
              shot  of  the  current  statistics and pauses until it receives SIGINT (typically from
              Ctrl-C), at which point it takes another snapshot and displays the difference  between
              the  two.   If  interval is specified, nfsstat will print the number of NFS calls made
              since the previous report.  Stats will be printed repeatedly every interval seconds.

EXAMPLES
       nfsstat -o all -234
              Show all information about all versions of NFS.

       nfsstat --verbose -234
              Same as above.

       nfsstat -o all
              Show all information about active versions of NFS.

       nfsstat --nfs --server -3
              Show statistics for NFS version 3 server.

       nfsstat -m
              Show information about mounted NFS filesystems.

DISPLAY
       The Flags output from the -m option is the same as the flags give to the mount command.

FILES
       /proc/net/rpc/nfsd
              procfs-based interface to kernel NFS server statistics.

       /proc/net/rpc/nfs
              procfs-based interface to kernel NFS client statistics.

       /proc/mounts
              procfs-based interface to the mounted filesystems.

SEE ALSO
       rpc.nfsd(8).  nfs(5).

BUGS
       The default output has been changed.  To get the old default  output  you  must  run  nfsstat
       --auto -2.

       The  function of the -v and -a options have changed. The -a option is now reserved for future
       use. The -v does what the -a option used to do, and the new -[234] options replace the -v op‐
       tion.

       The Display section should be more complete.

       Further bugs can be found or reported at http://nfs.sf.net/.

AUTHOR
       Olaf Kirch, <okir AT suse.de>

                                             7 Aug 2007                                   nfsstat(8)