nfsstat - list NFS statistics

       Olaf Kirch, <okir@suse.de>

                                                   7 Aug 2007                                         nfsstat(8)

       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/.

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

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

nfsstat-oall-234
              Show all information about all versions of NFS.

       nfsstat--verbose-234
              Same as above.

       nfsstat-oall
              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.

/proc/net/rpc/nfsdprocfs-based interface to kernel NFS server statistics.

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

       /proc/mountsprocfs-based interface to the mounted filesystems.

       nfsstat - list NFS statistics

-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.

       -ofacility
              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.

              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 -oall.

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

       -S,--sincefile
              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.

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

nfsstat [OPTION]...