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)