code: func (daemon *Daemon) newStatsCollector(interval time.Duration) *stats.Collector {
  	// FIXME(vdemeester) move this elsewhere
  	if runtime.GOOS == "linux" {
  		meminfo, err := system.ReadMemInfo()
  		if err == nil && meminfo.MemTotal > 0 {
  			daemon.machineMemory = uint64(meminfo.MemTotal)
  		}
  	}
  	s := stats.NewCollector(daemon, interval)
  	go s.Run()
  	return s
  }
docs: // newStatsCollector returns a new statsCollector that collections
  // stats for a registered container at the specified interval.
  // The collector allows non-running containers to be added
  // and will start processing stats when they are started.