Bukkit.yml Optimization to Reduce Lag

NOTE: This article is specific to Minecraft Java Edition servers and requires CraftBukkit, Spigot, or Paper to work.

Nobody likes lag. Fortunately, we have Minecraft server software that can optimize the server's performance for you. In this guide, we will walk you through the bukkit.yml configurations and show you our recommended values for optimal performance.

Below is a list of bukkit.yml settings and our recommended values for optimal performance. These settings have been tested and optimized to provide the best possible performance for your Minecraft server with minimal impact on gameplay.

OPTION

DESCRIPTION

RECOMMENDED VALUES

spawn-limits

You can adjust these options to increase or decrease the amount of mobs that spawn in your world per player. Take a look at the recommended values to see our suggestions and keep in mind that the lower these values are, the fewer mobs you will see and the better performance your server will have.

animals: 8 monsters: 50 water-animals: 3 ambient: 1

chunk-gc period-in-ticks

By reducing this number, your server will unload empty chunks faster, allowing more resources to be dedicated to the chunks that need them. Keep in mind that very low values may cause chunks to unload too frequently.

Default: 600 Optimized: 400

ticks-per monster-spawns

Instead of trying to spawn mobs on every tick, you can tell the server to spawn mobs less frequently by increasing this number. Keep in mind that this setting does not limit mob spawning; it only spaces out the attempts.

Default: 1 Optimized: 4

If you are running a Spigot or Paper server, you can further optimize your server with even more options. You can learn more about these optimizations in our other guides.