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(Glow Item Frame, Item Frame, Leash Knot, Painting): 800 within a 2 block radius
Projectiles(Llama Spit, Breeze Wind Charge, Shulker Bullet, Small Fireball, Spectral Arrow, Dragon Fireball, Egg, Ender Pearl, Lingering Potion, Experience Bottle, Wither Skull, Fishing Bobber, Snowball, Fireball, Splash Potion, Firework Rocket, Arrow, Trident, Wind Charge): 35 within a 5 block radius
Bosses(Wither, Warden): 5 within a 15 block radius
Laggyvillagers(Pillager, Villager, Wandering Trader): 18 within a 5 block radius
Farmable(Polar Bear, Snow Golem, Panda, Zombie Horse, Slime, Rabbit, Axolotl, Parrot, Hoglin, Frog, Sniffer, Magma Cube, Shulker, Strider, Skeleton Horse, Fox, Llama, Horse, Bee, Cow, Trader Llama, Iron Golem, Sheep, Chicken, Goat, Donkey, Turtle, Ocelot, Mooshroom, Wolf, Happy Ghast, Pig, Camel, Mule, Cat, Armadillo): 15 within a 5 block radius
Monsters(Bogged, Guardian, Piglin Brute, Zombie Villager, Vindicator, Endermite, Spider, Wither Skeleton, Elder Guardian, Skeleton, Creeper, Illusioner, Zombified Piglin, Breeze, Husk, Ravager, Zoglin, Evoker, Silverfish, Blaze, Drowned, Enderman, Vex, Cave Spider, Giant, Piglin, Witch, Creaking, Stray, Zombie): 15 within a 5 block radius
Watermobs(Tropical Fish, Glow Squid, Squid, Tadpole, Dolphin, Cod, Salmon, Pufferfish): 10 within a 5 block radius
Mobs(Allay, Phantom, Ghast, Bat): 30 within a 5 block radius
Fallingblock(Falling Block): 30 within a 5 block radius
Explosive(End Crystal, Tnt): 30 within a 5 block radius
Vehicles(Furnace Minecart, Bamboo Chest Raft, Mangrove Boat, Cherry Chest Boat, Jungle Boat, Birch Boat, Bamboo Raft, Cherry Boat, Acacia Chest Boat, Spawner Minecart, Acacia Boat, Birch Chest Boat, Chest Minecart, Mangrove Chest Boat, Spruce Chest Boat, Pale Oak Boat, Jungle Chest Boat, Hopper Minecart, Command Block Minecart, Tnt Minecart, Dark Oak Boat, Dark Oak Chest Boat, Pale Oak Chest Boat, Minecart, Oak Chest Boat, Oak Boat, Spruce Boat): 20 within a 5 block radius
Uncategorized(Marker, Evoker Fangs, Eye Of Ender, Text Display, Block Display, Item Display, Area Effect Cloud, Interaction, Lightning Bolt, Ominous Item Spawner): 150 within a 7 block radius