Is there a way in 1.18 to limit/kill mobs in forceloaded chunks (with a goal to minimize active entities and server lag)?
Solution 1:
To kill all entities in a certain rectangular area (like a chunk), you could run something like this in a repeat command block:
/execute as @e[type=!minecraft:player,type=!minecraft:minecart,x=<lowerX>,y=-64,z=<lowerZ>,dx=<xSize>,dy=383,dz=<zSize>] run kill @s
To kill all entities that are not player or minecart from x, y, z: (lowerX, -64, lowerZ) to (lowerX + xSize + 1, 320, lowerZ + zSize + 1), that is a rectangular box from bedrock to sky limit.
Additional Info:
You should consider other options as it is not a good practice to use /forceload. consider this options:
- Better item transport instead of a line of hoppers.
- Local storage system, instead of transporting a long distance.
- What is your farm exactly? Maybe optimizing the farm efficiency could decrease the load a lot.