ClockStopper

A fabric mod that stops the game's tick cycle when no players are online.

229 Downloads

fabricmanagementoptimizationutility

About this Mod

A fabric mod that stops the game's tick cycle when no players are online. This allows the server to use practically zero system resources when no players are online.

Pros

Less server-side CPU usage when no players are online

Cons

Farms will not run and crops will not grow when no players are online, even in the spawn chunks.

NOTE: This mod will ONLY load on DEDICATED SERVERS. This mod will not be loaded on the client.

Available Versions

ClockStopper 1.0.1release

MC 1.21.11fabric

February 9, 2026

ClockStopper 1.0.0release

MC 1.21.1fabric

August 13, 2024

How to Install ClockStopper on Your Server

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

Set fabric Loader

In the panel under "Egg", select the fabric loader and matching Minecraft version (1.21.11).

Install Mod

Open the mod browser in the dashboard and search for "ClockStopper". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

fabric

Minecraft Versions

1.21.11, 1.21.1

Server-side

✓ Required

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

ClockStopper server crashes on startup – what to do?

Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.11). You can switch loaders with one click in the panel.

Is ClockStopper compatible with fabric?

ClockStopper officially supports fabric for Minecraft 1.21.11, 1.21.1. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with ClockStopper – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if ClockStopper consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.