Memory manager
by Chaotic Loom
Memory manager is a Fabric optimization mod for Minecraft 1.20.1 that clears unused memory on demand and at set intervals.
What it does
A player or server owner with operator rights can run a cleanup command, which triggers a garbage collection pass and frees memory the game no longer uses. The mod can also call the garbage collector automatically on a timer, so memory use stays lower without manual input. A config file controls how these automatic calls behave.
The mod was first made to clean up memory on a multiplayer server and later extended with more functions. It runs on the client, the server, or both, and it needs Fabric API. The source code is open under the MIT License, and the latest file is 1.0 for 1.20.1, published 2024-10-18.
Key features
Cleanup command
A new command triggers a memory cleanup on demand. It requires operator rights to run.
Automatic garbage collection
The mod can call the garbage collector on its own at intervals, without a command being typed.
Config system
A config file sets how the automatic cleanup behaves, so server owners can adjust it to their setup.
Utility focus
The mod is built around one job, clearing memory, and it does not add gameplay content.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 1
Use cases
Multiplayer servers
Server owners can run the cleanup command during play, or let the automatic calls handle it, to keep memory use in check on a busy world.
Who it’s for: Server owners and operators who want to free memory on a Fabric server, and players who run a long single-player session and want to clear memory without restarting.
How it compares
AutoSystemGC also performs automatic garbage collection, but it is not open source and is published under the All rights reserved license for 1.14.4 onward. Memory Check is server-side only, open source under the GNU General Public License v3.0 only, and covers 1.19.2 onward, so it fits servers that need only a check rather than a cleanup.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Memory manager | Fabric | 1.20.1 | Client or server, optional | 2024-10-18 |
| AutoSystemGC | Fabric | 1.14.4 – 1.21.3 | Client or server, optional | 2024-11-16 |
| Memory Check | Fabric | 1.19.2 – 26.3 | Server-side only | 2026-03-28 |
Questions
Does Memory manager need Fabric API?
Who can run the cleanup command?
Does Memory manager have to be installed on both sides?
In the catalog
Memory manager is one of 3,545 Optimization mods on ModsFinder, and one of 2,575 Optimization mods for Fabric. 34,764 mods support Minecraft 1.20.1.
More from Chaotic Loom
Similar mods
What the author says
This mod adds a new command, /cleanup, which cleanups the memory. This mod was originaly made to cleanup memory for my SMP, but i might add extra functionality to it. The command requieres OP to be executed.
Official listing
- Modrinth page
- modrinth.com/mod/memory-manager
- Owner
- Chaotic Loom
- Published
- 2024-10-18
- Updated on Modrinth
- 2024-10-18
- Facts verified
- 2026-10-15