Redstone & lag (3/3)
Limits per chunk
Animals 50 · villagers 30 · other creatures 60
Items 200 · armor stands 30 · minecarts 30 · boats 20
When a chunk is full, breeding, spawn eggs and natural spawning stop working there – you get a hint. Spawners keep running.
Too many items: the oldest disappear. Experience is merged, nothing is lost.
Spread big farms over several chunks (F3 + G shows chunk borders).