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NFSSTAT(1)		FreeBSD	General	Commands Manual		    NFSSTAT(1)

     nfsstat --	display	NFS statistics

     nfsstat [-cdEemszW] [-M core] [-N system] [-w wait]

     The nfsstat command displays statistics kept about	NFS client and server
     activity.	For the	NFSv4 server, the statistics are for operations	within
     the Compound RPCs and not the count of RPCs.  If you wish to compare RPC
     counts between NFSv3 and NFSv4, you must use statistics in	the client(s).

     The options are as	follows:

     -c	     Only display client side statistics.

     -d	     Display statistics	for the	new NFS	server that are	similar	to
	     those displayed by	iostat(8).  This includes kilobytes per	trans-
	     fer, transfers per	second,	and megabytes per second for read,
	     write, and	all operations.	 It also includes the current queue
	     depth, the	busy percentage, and latency for all operations.  If
	     the -W flag is added, commits per second, commit latency, read
	     latency, and write	latency	are also added to the display.	The
	     busy percentage shown can exceed 100 at times.  This is because
	     of	the way	busy percentages are calculated.  The busy time	is
	     calculated	by adding the elapsed time between the last time an
	     operation started or finished, and	the current time.  If there is
	     only one operation	outstanding, the "busy time" time will get
	     updated with the total time of that operation.  That means	that
	     the difference in the busy	time between the two measurement
	     intervals (often 1	second)	will increase by more than the mea-
	     surement interval.

     -e	     Report the	extra statistics collected by the NFS client and
	     server for	NFSv4.

     -E	     Similar to	-e except that the statistics include NFSv4.1 and the
	     numbers aren't clipped at one billion.  Only one of -e or -E can
	     be	specified.

     -M	     Extract values associated with the	name list from the specified
	     core instead of the default /dev/kmem.

     -m	     Report the	mount options for all new NFS client mounts.  This
	     option overrides all others and nfsstat will exit after complet-
	     ing the report.  This option is only supported by the new NFS

     -N	     Extract the name list from	the specified system instead of	the
	     default /boot/kernel/kernel.

     -s	     Only display server side statistics.

     -W	     Use wide format with interval short summary.  This	option is
	     especially	useful when combined with -c, -d, or -s	and a time

     -w	     Display a shorter summary of NFS activity for both	the client and
	     server at wait second intervals.

     -z	     Reset statistics after displaying them.

     /boot/kernel/kernel  default kernel namelist
     /dev/kmem		  default memory file

     fstat(1), netstat(1), ps(1), systat(1), sysctl(3),	iostat(8),
     nfsdumpstate(8), pstat(8),	vmstat(8)

     The nfsstat command appeared in 4.4BSD.

FreeBSD	11.2		       November	23, 2016		  FreeBSD 11.2


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