How to Optimize a Minecraft Server with Mods (Forge, Mohist, Arclight, CatServer, Magma)

This guide will show you how to troubleshoot lag issues on your Minecraft server with Mods, including various methods to identify and reduce lag.

Important: This guide is specifically designed for Minecraft Forge modded servers. If you are not sure whether your server uses plugins, mods, or neither, check this article.

Common Solutions:

One of the simplest ways to reduce lag is to decrease the server's view distance. To do so, please check our tutorial on how to reduce view distance.

Among the most common types of lag is entity-caused lag. This can be caused by a large number of entities on your server. Fortunately, we have a helpful guide that provides some tips on how to reduce entity-caused lag, available here.

Server Type Limitations:

Server plugins in Minecraft are powerful tools that enhance gameplay and offer various features. However, they may not optimize game performance at the same level as mods. This is because plugins operate within the limitations and restrictions of the Spigot server framework.

On the other hand, mods have fewer restrictions and have the advantage of directly modifying the game's code and mechanics. As a result, modded servers offer opportunities for more extensive optimizations and performance improvements.

Optimization Mods:

📋 FastWorkbench: (download here)

FastWorkbench is a Minecraft Forge mod that improves crafting performance by caching recipes and reducing unnecessary recipe checks. It fixes a bug introduced in Minecraft 1.12, preventing momentary freezes during shift-click crafting.

📋 FastFurnace: (download here)

Created by the same author as FastWorkbench, FastFurnace is a Forge mod that improves the TPS (Ticks Per Second) performance of furnaces, blast furnaces, and smokers. Similarly to FastWorkbench, this is achieved by caching the last used recipe and avoiding unnecessary registry scans, which speeds up the processing time of furnace blocks.

📋 AI Improvements: (download here)

AI Improvements is a Forge mod focused on optimizing AI performance and making low-level modifications to AI behavior. It addresses common issues such as entity overcrowding, performance impact from large zombie swarms, and neglected tasks. Additionally, the AI Improvements mod does not need to be installed on the game client alongside the server.

By improving how AI works, the mod improves server performance without the need to trim extensive mods. It offers various configurable features, such as disabling specific AI segments and replacing EntityLookHelper with a more efficient version, resulting in significant CPU usage reductions on older Minecraft versions.

Conclusion

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