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Created January 27, 2022 09:02
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ruby_heap_size_rules_of_thumb.md

Ruby heap size rules of thumb

GC.stat[:heap_live_slots]
  • <1 million = don't sweat it
  • 1mil->3mil = Pretty average
  • 3mil->5mil = Typical of Big Chonker Monoliths
  • 5mil->10mil = Something probably wrong, fix to reduce RSS usage + speed up your GCs
  • 10mil+ = Nuke it from orbit, it's the only way to be sure
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