Minecraft 1.21 Tricky Trials: Server Admin Setup & Mob Spawning Guide

Running Minecraft 1.21 Tricky Trials Servers

The 1.21 Tricky Trials update brings procedural Trial Chambers, the Breeze mob, and the Mace weapon. While exciting for survival and SMP communities, the new subterranean chambers require specific server optimizations.

Essential Paper / Purpur 1.21 Tweaks

1. Trial Spawner Ticking: Set trial-spawners.simultaneous-monsters to balanced levels to avoid overloading chunk tick loops.
2. Aikar's Garbage Collection Flags: Use modern G1GC parameters with at least 8GB to 12GB allocated memory.
3. View Distance vs Simulation Distance: Decouple render distance (12) from simulation distance (6) in server.properties.

With these settings, your Minecraft SMP or network can maintain a solid 20.0 TPS even during heavy Trial Chamber raids.