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.

              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  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)