nfsstat

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 activ-
       ity.

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  in-
              formation about the versions of NFS that have non-zero counts.

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

       -4     Print only NFS v4 statistics. The default is to only  print  in-
              formation 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, in-
                     cluding 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.

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

              ra     Usage information on the server's read ahead  cache,  in-
                     cluding  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  statis-
              tics 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 nfs-
              stat 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  num-
              ber  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)