The following examples show how to set limits using the SET
      subcommand and its qualifiers:

    1.$ DEFRAGMENT SET PROCESS_LIMIT=3, IO_LIMIT=14/NODE=NODE_1

      In this example, the maximum number of defragmentation
      processes that can occur on NODE_1 is 3. Further, a restriction
      of 14 direct I/Os per second is placed on each of these 3
      defragmentation processes.

    2.$ DEFRAGMENT SET CPU_LIMIT=50

      In this example, the maximum CPU resources allocated to any
      defragmentation process is set to 50 percent on all nodes in
      the system. If a defragmentation process exceeds this limit,
      its priority is decremented each minute (approximately) until
      it reaches the SYSGEN parameter, DEFPRI, minus 1.