def get_mem_info()

in ambari-metrics-host-monitoring/src/main/python/core/host_info.py [0:0]

• 20 lines of code
• 13 McCabe index (conditional complexity)

  def get_mem_info(self):
    """
    Return memory statistics at current time
    """

    mem_stats = psutil.virtual_memory()
    swap_stats = psutil.swap_memory()
    mem_total = self.__host_static_info.get('mem_total')
    swap_total = self.__host_static_info.get('swap_total')

    bytes2kilobytes = lambda x: x / 1024
    mem_total = psutil.virtual_memory().total

    return {
      'mem_total': bytes2kilobytes(mem_total) if mem_total else 0,
      'mem_used': bytes2kilobytes(mem_stats.used - mem_stats.cached) if hasattr(mem_stats, 'used') and hasattr(mem_stats, 'cached') else 0, # Used memory w/o cached
      'mem_free': bytes2kilobytes(mem_stats.available) if hasattr(mem_stats, 'available') else 0, # the actual amount of available memory
      'mem_shared': bytes2kilobytes(mem_stats.shared) if hasattr(mem_stats, 'shared') else 0,
      'mem_buffered': bytes2kilobytes(mem_stats.buffers) if hasattr(mem_stats, 'buffers') else 0,
      'mem_cached': bytes2kilobytes(mem_stats.cached) if hasattr(mem_stats, 'cached') else 0,
      'swap_free': bytes2kilobytes(swap_stats.free) if hasattr(swap_stats, 'free') else 0,
      'swap_used': bytes2kilobytes(swap_stats.used) if hasattr(swap_stats, 'used') else 0,
      'swap_total': bytes2kilobytes(swap_total) if swap_total else 0,
      'swap_in': bytes2kilobytes(swap_stats.sin) if hasattr(swap_stats, 'sin') else 0,
      'swap_out': bytes2kilobytes(swap_stats.sout) if hasattr(swap_stats, 'sout') else 0,
      # todo: cannot send string
      #'part_max_used' : disk_usage.get("max_part_used")[0],
    }