nfsstat —
display NFS statistics
  
    | nfsstat | [ -cs] [-Mcore] [-Nsystem] [-wwait] | 
nfsstat displays statistics kept about NFS client and
  server activity.
The options are as follows:
  - -c
- Only display values for NFS client side.
- -s
- Only display values for NFS server side.
- -M
- Extract values associated with the name list from the specified core
      instead of the default /dev/kmem.
- -N
- Extract the name list from the specified system instead of the default
      /netbsd.
- -w
- Display a shorter summary of NFS activity for both the client and server
      at wait second intervals.
  - /netbsd
- default kernel namelist
- /dev/kmem
- default memory file
Thenfsstat command appears in
  4.4BSD.