usage: mountstats [-h] {mountstats,nfsstat,iostat} ...

positional arguments:
  {mountstats,nfsstat,iostat}
                        sub-command help
    mountstats          Display a combination of per-op RPC statistics, NFS event counts, and NFS
                        byte counts. This is the default sub-command if no sub-command is given.
    nfsstat             Display nfsstat-like statistics.
    iostat              Display iostat-like statistics.

options:
  -h, --help            show this help message and exit

For specific sub-command help, run 'mountstats SUB-COMMAND -h|--help'