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:
Armor stands (Armor Stand): 50 within a 10 block radius
Xp orbs (Experience Orb): 50 within a 3 block radius
Items (Item): 1000 within a 2 block radius
Cushions (Cushion): 300 within a 7 block radius
Hanging (Painting, Item Frame, Glow Item Frame, Leash Knot): 2000 within a 2 block radius
Projectiles (Firework Rocket, Egg, Wind Charge, Spectral Arrow, Llama Spit, Wither Skull, Breeze Wind Charge, Arrow, Fishing Bobber, Trident, Ender Pearl, Experience Bottle, Shulker Bullet, Fireball, Lingering Potion, Snowball, Small Fireball, Dragon Fireball, Splash Potion): 50 within a 5 block radius
Bosses (Wither, Warden): 10 within a 15 block radius
Villagers and pillagers (Pillager, Villager, Wandering Trader): 30 within a 5 block radius
Farmable (Happy Ghast, Llama, Nautilus, Camel, Snow Golem, Rabbit, Panda, Trader Llama, Armadillo, Camel Husk, Slime, Chicken, Axolotl, Goat, Polar Bear, Wolf, Mule, Sniffer, Zombie Horse, Copper Golem, Fox, Shulker, Zombie Nautilus, Pig, Horse, Sheep, Cat, Iron Golem, Bee, Cow, Strider, Frog, Ocelot, Parrot, Hoglin, Mooshroom, Donkey, Skeleton Horse, Turtle): 30 within a 5 block radius
Monsters (Wither Skeleton, Parched, Ravager, Creeper, Guardian, Witch, Piglin Brute, Vindicator, Zombified Piglin, Enderman, Skeleton, Giant, Illusioner, Elder Guardian, Husk, Endermite, Piglin, Bogged, Stray, Zombie, Spider, Vex, Cave Spider, Zoglin, Drowned, Creaking, Breeze, Zombie Villager, Blaze, Silverfish, Evoker): 30 within a 5 block radius
Water mobs (Tropical Fish, Squid, Tadpole, Dolphin, Pufferfish, Salmon, Cod, Glow Squid): 30 within a 5 block radius
Mobs (Sulfur Cube, Bat, Phantom, Magma Cube, Ghast, Allay): 50 within a 5 block radius
Falling blocks (Falling Block): 50 within a 5 block radius
Explosive (End Crystal, Tnt): 50 within a 5 block radius
Vehicles (Dark Oak Chest Boat, Spruce Boat, Chest Minecart, Bamboo Chest Raft, Birch Boat, Dark Oak Boat, Mangrove Boat, Tnt Minecart, Birch Chest Boat, Poplar Chest Boat, Pale Oak Chest Boat, Furnace Minecart, Acacia Chest Boat, Minecart, Bamboo Raft, Oak Boat, Mangrove Chest Boat, Spruce Chest Boat, Spawner Minecart, Command Block Minecart, Jungle Boat, Jungle Chest Boat, Cherry Boat, Oak Chest Boat, Cherry Chest Boat, Poplar Boat, Acacia Boat, Pale Oak Boat, Hopper Minecart): 80 within a 8 block radius
Uncategorized (Text Display, Ominous Item Spawner, Area Effect Cloud, Evoker Fangs, Mannequin, Eye Of Ender, Lightning Bolt, Item Display, Marker, Block Display, Interaction): 150 within a 7 block radius