centos man page for 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 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 cur-
	      rent 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  repeat-
	      edly 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)