Minecraft server optimization guide
DOWNLOAD LINK : https://yagla.tv/cRMdFts
PASSWORD : 2026

Note for users that are on vanilla, Fabric or Spigot (or anything below Paper) - go to your server.properties and change sync-chunk-writes to false. This option is forcibly set to false on Paper and its forks, but on other server implementations you need to switch this to false manually. This allows the server to save chunks off the main thread, lessening the load on the main tick loop.

Guide for version 1.21.5. Some things may still apply to 1.15 - 1.21.4.

Based on this guide and other sources (all of them are linked throughout the guide when relevant).

Use the table of contents located above (next to README.md) to easily navigate throughout this guide.

Intro
There will never be a guide that will give you perfect results. Each server has their own needs and limits on how much you can or are willing to sacrifice. Tinkering around with the options to fine tune them to your servers needs is what it's all about. This guide only aims to help you understand what options have impact on performance and what exactly they change. If you think you found inaccurate information within this guide, you're free to open an issue or set up a pull request to correct it.