DockerEngine 20.10.10: KeyError: 'total_cache'  #81

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1. flusteredfognozzle commented on Dec 19, 2021

   

   flusteredfognozzle

   on Dec 19, 2021

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   Same here :/
   Seems to be related to this issue:
   hashicorp/nomad#10251
2. flusteredfognozzle commented on Dec 20, 2021

   

   flusteredfognozzle

   on Dec 20, 2021

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   Just saw there is a pull request:
   #82

   👍React with 👍1Reacted by Tomáš Mózes
3. blue212121 commented on Mar 17, 2023

   

   blue212121

   on Mar 17, 2023

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   dirty fix with limited/no testing for Docker version 20.10.12, build 20.10.12-0ubuntu4:

   change 'total_cache' to 'inactive_file' in line 523, result seems to be the same

   before:

      510  # Checks
      511  #############################################################################################
      512
      513  @multithread_execution()
      514  @require_running(name='memory')
      515  def check_memory(container, thresholds):
      516      if not thresholds.units in unit_adjustments:
      517          unknown("Memory units must be one of  {}".format(list(unit_adjustments.keys())))
      518          return
      519
      520      inspection = get_stats(container)
      521
      522      # Subtracting cache to match what `docker stats` does.
      523      adjusted_usage = inspection['memory_stats']['usage'] - inspection['memory_stats']['stats']['total_cache']
      524      if thresholds.units == '%':
      525          max = 100
      526          usage = int(100 * adjusted_usage / inspection['memory_stats']['limit'])
      527      else:
      528          max = inspection['memory_stats']['limit'] / unit_adjustments[thresholds.units]
      529          usage = adjusted_usage / unit_adjustments[thresholds.units]
      530
      531      evaluate_numeric_thresholds(container=container, value=usage, thresholds=thresholds, name='memory',
      532                                  short_name='mem', min=0, max=max)
      533
      534
   

   after:

      510  # Checks
      511  #############################################################################################
      512
      513  @multithread_execution()
      514  @require_running(name='memory')
      515  def check_memory(container, thresholds):
      516      if not thresholds.units in unit_adjustments:
      517          unknown("Memory units must be one of  {}".format(list(unit_adjustments.keys())))
      518          return
      519
      520      inspection = get_stats(container)
      521
      522      # Subtracting cache to match what `docker stats` does.
      523      adjusted_usage = inspection['memory_stats']['usage'] - inspection['memory_stats']['stats']['inactive_file']
      524      if thresholds.units == '%':
      525          max = 100
      526          usage = int(100 * adjusted_usage / inspection['memory_stats']['limit'])
      527      else:
      528          max = inspection['memory_stats']['limit'] / unit_adjustments[thresholds.units]
      529          usage = adjusted_usage / unit_adjustments[thresholds.units]
      530
      531      evaluate_numeric_thresholds(container=container, value=usage, thresholds=thresholds, name='memory',
      532                                  short_name='mem', min=0, max=max)
      533
      534
   
4. jensritter commented on Mar 20, 2023

   

   jensritter

   on Mar 20, 2023

   Last edited by jensritter

   Author

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   This looks good.

   Here some test-values from my System with 5:20.10.6~3-0~debian-bullseye:

   "docker stats":
   CONTAINER ID NAME CPU % MEM USAGE / LIMIT MEM % NET I/O BLOCK I/O PIDS
   563e5e2ba213 sonar 1.35% 3.054GiB / 13.66GiB 22.35% 8GB / 8.1GB 730MB / 7.39GB 241

   'memory_stats': {
   'usage': 3598192640,
   'stats': {
   'active_anon': 0,
   'active_file': 301445120,
   'anon': 2934972416,
   'anon_thp': 2768240640,
   'file': 621096960,
   'file_dirty': 0,
   'file_mapped': 41631744,
   'file_writeback': 0,
   'inactive_anon': 2940768256,
   'inactive_file': 319369216,
   'kernel_stack': 3932160,
   'pgactivate': 122199,
   'pgdeactivate': 1008,
   'pgfault': 3038112,
   'pglazyfree': 0,
   'pglazyfreed': 0,
   'pgmajfault': 594,
   'pgrefill': 1437,
   'pgscan': 39214,
   'pgsteal': 27354,
   'shmem': 0,
   'slab': 23162272,
   'slab_reclaimable': 20154376,
   'slab_unreclaimable': 3007896,
   'sock': 114688,
   'thp_collapse_alloc': 1089,
   'thp_fault_alloc': 2442,
   'unevictable': 0,
   'workingset_activate': 0,
   'workingset_nodereclaim': 0,
   'workingset_refault': 0
   },
   'limit': 14671679488
   }
5. martialblog

   added this to the v2.3.0 milestone on Jan 26, 2026
6. martialblog

   self-assigned this

   on Jan 26, 2026
7. martialblog commented on Jan 26, 2026

   

   martialblog

   on Jan 26, 2026

   Collaborator

   More actions

   This will be fixed with #99
8. martialblog

   added

   bug

   on Jan 26, 2026
9. martialblog commented on Jan 27, 2026

   

   martialblog

   on Jan 27, 2026

   Collaborator

   More actions

   This will be included in the next release.
10. martialblog

    closed this as completedon Jan 27, 2026