code: def need_summary(self, now, max_updates, max_age):
          
  
          # Handle the case where an old summarize record exists
          if self.summarized is True and self.last_summarize_ts + max_age <= now:
              return True
  
          return self.summarized is False and self.updates >= max_updates
docs: Helper method to determine if a "summarize" record should be
          added.
  
          :param now: The current time.
          :param max_updates: Maximum number of updates before a
                              summarize is required.
          :param max_age: Maximum age of the last summarize record.
                          This is used in the case where a summarize
                          request has been lost by the compactor.
  
          :returns: True if a "summarize" record should be added, False
                    otherwise.