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nfsstat - display NFS statistics
nfsstat [ interval ]
nfsstat -h [ ip_address | host_name ]
nfsstat -l
nfsstat -z
nfsstat displays statistical information about NFS (Network
File System) and RPC (Remote Procedure Call) for the filer.
It can also be used to reinitialize this information. If no
arguments are given, nfsstat displays statistical information
since last reboot, or last zeroed with the -z option.
If the interval argument is specified, nfsstat will continuously
display the summary information for the following NFS
requests: getattr, lookup, readlink, read, write, create,
remove, and readdir/readdirplus. The first line of data
displayed, and every 20th line thereafter, contains cumulative
statistics. Each subsequent line shows incremental
statistics for the interval (in seconds) since the last
display.
Per-client statistics can also be collected and displayed by
enabling the nfs.per_client_stats.enable options (using the
options command - see na_options(1)) and invoking nfsstat
with the -h or the -l options. Per-client statistics are
collected for up to the first 256 NFS clients that have
mounted the filesystem on the given filer.
-h Display per-client statistics since last reboot, or
last zeroed with the -z option. The statistics are
displayed on a per-client basis, with the IP address
and host name (where available) of each client being
displayed at the head of each client's block of statistics.
If an optional IP address or host name is specified
with the -h option, only the statistics associated with
this client are displayed.
- -l
- Display a list of the clients whose statistics have
been collected on a per-client basis, along with the
total NFS calls for that client since last reboot, or
last zeroed with the -z option, the count being
displayed both as the actual count and as a percentage
of calls from all clients.
- -z
- Zero (reinitialize) statistics.
The server RPC display includes the following fields, with
separate values for TCP and UDP:
- calls
- The total number of RPC calls received.
badcalls The total number of calls rejected by the RPC
layer (the sum of badlen and xdrcall as
defined below).
nullrecv The number of times an RPC call was not
available when it was thought to be received.
- badlen
- The number of RPC calls with a length shorter
than a minimum-sized RPC call.
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.
nfsstat -l reports unexpected percentages, if the
nfs.per_client_stats.enable option is enabled after the system
has been running for a while (typically this option
should be enabled at system startup time via the /etc/rc
file). Resetting the statistics via the nfsstat -z command
will clear this condition.
nfsstat -h and nfsstat -l list some clients that have made
no NFS calls to the filer. Also, nfsstat -z clears the
statistics, but does not clear the list of clients (for the
per-client statistics). The same clients will continue to
be listed with the nfsstat -h or the nfsstat -l options even
though they may have made no NFS calls after the statistics
were cleared.
na_netstat(1), na_options(1), na_sysstat(1).
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