How to Stop Memory Leaks from Drowned and Entity Brains in Minecraft

The Specific Leaks This Mod Targets

Two of the most persistent leaks in modern Minecraft come from entity brain memory and drowned navigation data. Mobs with AI brains (villagers, piglins, and similar) store memory modules that can accumulate if not cleaned. Drowned, which use special navigation for swimming, leave behind pathfinding data that adds up in ocean-heavy worlds.

What You Need to Do

1. Make sure Put A Plug In It is installed on both server and client if you play multiplayer. Entity cleanup happens server-side, but consistency helps.

2. Play normally in areas with lots of mobs — ocean monuments, drowned farms, villager trading halls. These are the stress points where the leaks would normally show.

3. Observe your memory usage with the F3 debug screen or an external profiler. Before the mod, these areas cause steady RAM growth. After, memory should stabilize.

4. If you run a drowned farm, the navigation cleanup means fewer stale path objects accumulate, so the farm should not degrade server performance over time.

5. Do not disable entity AI or brain systems via other mods to "fix" the leak — that breaks mob behavior. Let this mod handle cleanup instead.

Verifying It Works

Run a long AFK session near heavy mob activity. If RAM holds steady instead of climbing, the brain-memory and drowned navigation fixes are doing their job.