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Massive Entity Lag

TPS drops and the server struggles because far too many entities are loaded at once. Large mob farms, item build-ups, or runaway breeding push the entity count past what the CPU can tick in time.

O que significa este erro?
Every entity, mob, item, projectile, is updated each tick. When thousands accumulate in loaded chunks, the per-tick cost grows until the server cannot keep 20 TPS. The reported count is a symptom of unmanaged farms or accumulation. 
Entity count over 15,000
Causas mais comuns
  • Oversized or unbounded mob farms.
  • Piles of dropped items that never despawn fast enough.
  • Uncontrolled animal breeding.
  • Mods/plugins spawning extra entities.
  • Mob caps set too high for the hardware.
Como diagnosticar
  1. Use spark or a plugin to count entities per chunk and per type.
  2. Identify hotspots, farms or storage areas usually dominate.
  3. Check item-drop accumulation near AFK/farm areas.
  4. Review mob-spawn and despawn settings.
Correções recomendadas
  • Cap or redesign farms
    Limit farm output and add kill/collection mechanisms so entities do not pile up.
  • Tune entity settings
    On Paper, adjust per-chunk entity limits and item-merge/despawn rates.
  • Clear excess entities
    Carefully use /kill with type filters (never plain /kill @e) to remove surplus mobs/items.
  • Lower mob caps
    Reduce spawn caps in server.properties or Paper config to fit your hardware.
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Perguntas frequentes

No, it removes players' items, paintings, and more. Always filter by type, e.g. /kill @e[type=item].

It depends on hardware, but tens of thousands of entities will lag almost any server.

Yes, Paper offers per-chunk entity limits and merging that vanilla lacks.