Running a Minecraft server in 2026 requires more than just high-spec RAM. With the 1.21 update, chunk loading and entity ticking have become more demanding. To keep your TPS at a steady 20, you need to optimize your pipeline from the JVM up to the world settings.
Choose Your Jar
Ditch Vanilla and Spigot. For the best performance-to-feature ratio, use Purpur. It is a fork of Paper and Pufferfish that includes specialized patches for technical lag.
World Pre-generation
The #1 cause of lag spikes is 'On-the-fly' chunk generation. Use the Chunky plugin to generate your world before players join.
/chunky radius 5000
/chunky start
Optimized Configs
Inside your server.properties and paper-world.yml, apply these 'Magic' values to reduce CPU overhead without ruining the player experience:
- view-distance: 7 (The sweet spot for visibility vs. performance)
- simulation-distance: 4 (Only ticks what matters near the player)
- entity-activation-range: Reduce animals to 16 and monsters to 24.merge-radius: Increase items to 4.0 to group dropped loot faster.
JVM Arguments
Ensure your startup script uses Aikar’s Flags. These optimize how Java handles 'Garbage Collection,' preventing those annoying micro-stutters every few seconds.