Mob Limits

Limits on Large Groups of Mobs.

To optimize server performance, large clusters of mobs are regulated.
Entities are not limited per chunk but are limited by their group (see below).
Groups of mobs that exceed the limit are periodically identified and culled,
exempting those with special characteristics like being a custom mob or tamed.
When a mob is removed, you will see a smoke effect.

For example, if the limit is 10 mobs within 5 blocks, it will group all mobs in the same group
that are less than 5 blocks from each-other into one large group and remove the excess mobs.

If you wanted to have more than 10 mobs in this example, you need to have at least 5 blocks
between your groups to prevent them being counted as one group.

Mob limits:
Armorstands (Armor Stand): 30 within a 10 block radius
Xporb (Experience Orb): 50 within a 3 block radius
Items (Item): 500 within a 2 block radius
Hanging (Leash Knot, Glow Item Frame, Item Frame, Painting): 2000 within a 2 block radius
Projectiles (Lingering Potion, Fishing Bobber, Breeze Wind Charge, Experience Bottle, Snowball, Dragon Fireball, Fireball, Firework Rocket, Llama Spit, Trident, Egg, Ender Pearl, Splash Potion, Wither Skull, Arrow, Shulker Bullet, Spectral Arrow, Small Fireball, Wind Charge): 35 within a 5 block radius
Bosses (Wither, Warden): 5 within a 15 block radius
Laggyvillagers (Villager, Pillager, Wandering Trader): 18 within a 5 block radius
Farmable (Bee, Slime, Axolotl, Polar Bear, Panda, Fox, Cat, Cow, Shulker, Sniffer, Rabbit, Snow Golem, Camel Husk, Chicken, Donkey, Mooshroom, Trader Llama, Hoglin, Wolf, Zombie Horse, Camel, Armadillo, Pig, Goat, Llama, Nautilus, Parrot, Copper Golem, Strider, Iron Golem, Happy Ghast, Horse, Skeleton Horse, Sheep, Magma Cube, Mule, Ocelot, Zombie Nautilus, Turtle, Frog): 15 within a 5 block radius
Monsters (Zombie Villager, Endermite, Piglin, Zombie, Stray, Evoker, Drowned, Silverfish, Elder Guardian, Witch, Parched, Spider, Skeleton, Zombified Piglin, Husk, Bogged, Cave Spider, Giant, Blaze, Zoglin, Creeper, Illusioner, Vex, Creaking, Enderman, Wither Skeleton, Ravager, Piglin Brute, Breeze, Guardian, Vindicator): 15 within a 5 block radius
Watermobs (Tropical Fish, Dolphin, Glow Squid, Cod, Tadpole, Pufferfish, Salmon, Squid): 10 within a 5 block radius
Mobs (Allay, Bat, Phantom, Ghast): 30 within a 5 block radius
Fallingblock (Falling Block): 30 within a 5 block radius
Explosive (Tnt, End Crystal): 30 within a 5 block radius
Vehicles (Oak Boat, Oak Chest Boat, Chest Minecart, Spruce Chest Boat, Mangrove Chest Boat, Command Block Minecart, Cherry Boat, Dark Oak Chest Boat, Jungle Boat, Birch Boat, Furnace Minecart, Dark Oak Boat, Tnt Minecart, Minecart, Birch Chest Boat, Jungle Chest Boat, Hopper Minecart, Spruce Boat, Acacia Chest Boat, Cherry Chest Boat, Bamboo Chest Raft, Pale Oak Boat, Bamboo Raft, Acacia Boat, Spawner Minecart, Mangrove Boat, Pale Oak Chest Boat): 40 within a 8 block radius
Uncategorized (Area Effect Cloud, Block Display, Evoker Fangs, Lightning Bolt, Mannequin, Interaction, Marker, Text Display, Item Display, Eye Of Ender, Ominous Item Spawner): 150 within a 7 block radius