nfsstat
— display
NFS statistics
nfsstat |
[--libxo ] [-cdEemqszW ]
[-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 NFS server that are similar to those displayed
by
iostat(8).
This includes kilobytes per transfer, 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 measurement 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 NFSv4.2 and the numbers aren't clipped at one billion. Only
one of -e
or -E
can be
specified.
-M
- Deprecated and ignored.
-m
- Report the mount options for all NFS client mounts. This option overrides
all others and
nfsstat
will exit after completing
the report.
-N
- Deprecated and ignored.
-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
delay.
-w
wait
- Display a shorter summary of NFS activity for both the client and server
at wait second intervals.
-z
- Reset statistics after displaying them.
-q
- Do not print headers.
--libxo
- Generate output via
libxo(3)
in a selection of different human and machine readable formats. See
xo_parse_args(3)
for details on command line arguments.
The nfsstat
command appeared in
4.4BSD.