nfsstat(1M) System Administration Commands nfsstat(1M)NAMEnfsstat - NFS statistics
SYNOPSISnfsstat [-cnrsza] [-T u | d ] [-v version] [interval [count]]
nfsstat-m [pathname]...
DESCRIPTIONnfsstat displays statistical information about the NFS and RPC (Remote
Procedure Call), interfaces to the kernel. It can also be used to
reinitialize this information. If no options are given the default is
as follows:
nfsstat-csnra
The default displays everything, but reinitializes nothing.
OPTIONS-a
Display NFS_ACL information.
-c
Display client information. Only the client side NFS, RPC, and
NFS_ACL information is printed. Can be combined with the -n, -r,
and -a options to print client side NFS, RPC, and NFS_ACL informa‐
tion only.
-m [pathname...]
Display statistics for each NFS mounted file system. If pathname is
not specified, displays statistics for all NFS mounted file sys‐
tems. If pathname is specified, displays statistics for the NFS
mounted file systems indicated by pathname.
This includes the server name and address, mount flags, current
read and write sizes, the retransmission count, the attribute cache
timeout values, failover information, and the timers used for
dynamic retransmission. The dynamic retransmission timers are dis‐
played only where dynamic retransmission is in use. By default, NFS
mounts over the TCP protocols and NFS Version 3 mounts over either
TCP or UDP do not use dynamic retransmission.
If you specify the -m option, this is the only option that nfsstat
uses. If you specify other options with -m, you receive an error
message alerting that the -m flag cannot be combined with other
options.
-n
Display NFS information. NFS information for both the client and
server side are printed. Can be combined with the -c and -s options
to print client or server NFS information only.
-r
Display RPC information.
-s
Display server information.
-T u | d
Display a time stamp.
Specify u for a printed representation of the internal representa‐
tion of time. See time(2). Specify d for standard date format. See
date(1).
-v version
Specify which NFS version for which to print statistics. When fol‐
lowed by the optional version argument, (2|3|4), specifies statis‐
tics for that version. By default, prints statistics for all ver‐
sions.
-z
Zero (reinitialize) statistics. This option is for use by the super
user only, and can be combined with any of the above options to
zero particular sets of statistics after printing them.
OPERANDS
The following operands are supported:
count
Display only count reports
interval
Report once each interval seconds.
pathname
Specify the pathname of a file in an NFS mounted file system for
which statistics are to be displayed.
DISPLAYS
The server RPC display includes the following fields:
badcalls
The total number of calls rejected by the RPC layer (the sum of
badlen and xdrcall as defined below).
badlen
The number of RPC calls with a length shorter than a minimum-sized
RPC call.
calls
The total number of RPC calls received.
dupchecks
The number of RPC calls that looked up in the duplicate request
cache.
dupreqs
The number of RPC calls that were found to be duplicates.
nullrecv
The number of times an RPC call was not available when it was
thought to be received.
xdrcall
The number of RPC calls whose header could not be XDR decoded.
The server NFS display shows the number of NFS calls received (calls)
and rejected (badcalls), and the counts and percentages for the various
calls that were made.
The server NFS_ACL display shows the counts and percentages for the
various calls that were made.
The client RPC display includes the following fields:
calls
The total number of RPC calls made.
badcalls
The total number of calls rejected by the RPC layer.
badverfs
The number of times the call failed due to a bad verifier in the
response.
badxids
The number of times a reply from a server was received which did
not correspond to any outstanding call.
cantconn
The number of times the call failed due to a failure to make a con‐
nection to the server.
cantsend
The number of times a client was unable to send an RPC request over
a connectionless transport when it tried to do so.
interrupts
The number of times the call was interrupted by a signal before
completing.
newcreds
The number of times authentication information had to be refreshed.
nomem
The number of times the call failed due to a failure to allocate
memory.
retrans
The number of times a call had to be retransmitted due to a timeout
while waiting for a reply from the server. Applicable only to RPC
over connection-less transports.
timeouts
The number of times a call timed out while waiting for a reply from
the server.
timers
The number of times the calculated time-out value was greater than
or equal to the minimum specified time-out value for a call.
The client NFS display shows the number of calls sent and rejected, as
well as the number of times a CLIENT handle was received (clgets), the
number of times the CLIENT handle cache had no unused entries
(cltoomany), as well as a count of the various calls and their respec‐
tive percentages.
The client NFS_ACL display shows the counts and percentages for the
various calls that were made.
The -m option includes information about mount flags set by mount
options, mount flags internal to the system, and other mount informa‐
tion. See mount_nfs(1M).
The following mount flags are set by mount options:
forcedirectio
Data transferred directly between client and server, with no
buffering on client.
grpid
BSD group id inheritance. See description in mount_nfs(1M).
hard
Hard mount.
intr
Interrupts allowed on hard mount.
llock
Local locking being used (no lock manager). Note that this is a
private interface.
noac
Client is not caching attributes.
nointr
No interrupts allowed on hard mount.
nocto
No close-to-open consistency.
retrans
NFS retransmissions.
rpctimesync
RPC time sync.
rsize
Read buffer size in bytes.
sec
sec has one of the following values:
dh
des-style authentication (encrypted timestamps).
krb5
kerberos v5-style authentication.
krb5i
kerberos v5-style authentication with integrity.
krb5p
kerberos v5-style authentication with privacy.
none
No authentication.
short
Short hand UNIX-style authentication.
sys
UNIX-style authentication (UID, GID).
soft
Soft mount.
timeo
Initial NFS timeout, in tenths of a second.
wsize
Write buffer size in bytes.
The following mount flags are internal to the system:
acl
Server supports NFS_ACL.
down
Server is down.
dynamic
Dynamic transfer size adjustment.
link
Server supports links.
mirrormount
Mounted automatically by means of the mirrormount mechanism.
printed
"Not responding" message printed.
readdironly
Use readdir instead of readdirplus.
referral
Mounted automatically by means of the referral mechanism.
symlink
Server supports symbolic links.
The following flags relate to additional mount information:
proto
Protocol.
vers
NFS version.
The -m option also provides attribute cache timeout values. The follow‐
ing fields in -m ouput provide timeout values for attribute cache:
acdirmax
Maximum seconds to hold cached directory attributes.
acdirmin
Minimum seconds to hold cached directory attributes.
acregmax
Maximum seconds to hold cached file attributes.
acregmin
Minimum seconds to hold cached file attributes.
The following fields in -m output provide failover information:
currserver
Which server is currently providing NFS service. See the for addi‐
tional details.
failover
How many times a new server has been selected.
noresponse
How many times servers have failed to respond.
remap
How many times files have been re-evaluated to the new server.
The fields in -m output shown below provide information on dynamic
retransmissions. These items are displayed only where dynamic retrans‐
mission is in use.
cur
Current backed-off retransmission value, in milliseconds.
dev
Estimated deviation, in milliseconds.
srtt
The value for the smoothed round-trip time, in milliseconds.
EXIT STATUS
The following exit values are returned:
0
Successful completion.
>0
An error occurred.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌─────────────────────────────┬─────────────────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├─────────────────────────────┼─────────────────────────────┤
│Availability │system/file-system/nfs │
└─────────────────────────────┴─────────────────────────────┘
SEE ALSOmount_nfs(1M), attributes(5)SunOS 5.11 7 Nov 2009 nfsstat(1M)