code: def _add_mem_percent(self, cur_read):
          
          for executor_id, cur_data in cur_read.items():
              stats = cur_data['statistics']
              mem_rss_bytes = stats.get('mem_rss_bytes')
              mem_limit_bytes = stats.get('mem_limit_bytes')
              if mem_rss_bytes and mem_limit_bytes != 0:
                  stats['mem_percent'] = mem_rss_bytes / float(mem_limit_bytes)
docs: Compute memory percent utilisation based on the
          mem_rss_bytes and mem_limit_bytes