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
              statistics.

       -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
              versions of NFS that have non-zero counts.

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

       -4     Print only NFS v4 statistics. The default is to only print  information  about  the
              versions 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
                     number of lookups, and the number of hits and 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
              displays  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 statistics 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
              snapshot 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 option.

       The Display section should be more complete.

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

AUTHOR

       Olaf Kirch, <okir@suse.de>

                                            7 Aug 2007                                 nfsstat(8)