code: def cmd_queue_peaks(self):
          
          threshold = 1
          peaks = []
          current_peak = 0
          current_queue = 0
  
          current_span = 0
          first_on_queue = None
  
          for line in self._valid_lines:
              current_queue = line.queue_backend
  
              if current_queue > 0:
                  current_span += 1
  
                  if first_on_queue is None:
                      first_on_queue = line.accept_date
  
              if current_queue == 0 and current_peak > threshold:
                  data = {
                      'peak': current_peak,
                      'span': current_span,
                      'first': first_on_queue,
                      'last': line.accept_date,
                  }
                  peaks.append(data)
                  current_peak = 0
                  current_span = 0
                  first_on_queue = None
  
              if current_queue > current_peak:
                  current_peak = current_queue
  
          # case of a series that does not end
          if current_queue > 0 and current_peak > threshold:
              data = {
                  'peak': current_peak,
                  'span': current_span,
                  'first': first_on_queue,
                  'last': line.accept_date,
              }
              peaks.append(data)
  
          return peaks
docs: Generate a list of the requests peaks on the queue.
  
          A queue peak is defined by the biggest value on the backend queue
          on a series of log lines that are between log lines without being
          queued.
  
          .. warning::
            Allow to configure up to which peak can be ignored. Currently
            set to 1.