Execution example::

  % curl http://localhost:10041/d/status
  [
    [
      0, 
      1337566253.89858, 
      0.000355720520019531
    ], 
    {
      "uptime": 0, 
      "max_command_version": 2, 
      "n_queries": 0, 
      "cache_hit_rate": 0.0, 
      "version": "4.0.1", 
      "alloc_count": 161, 
      "command_version": 1, 
      "starttime": 1395806036, 
      "default_command_version": 1
    }
  ]
