From c0cb00ed5532ae7017637cbc0f92ea9fda532a9f Mon Sep 17 00:00:00 2001
From: Christine Elisabeth Koppel <kuutruu@posteo.net>
Date: Fri, 20 Mar 2026 00:37:47 +0100
Subject: [PATCH] Go full power on Minecraft server

---
 .../modules/system/minecraft.nix              | 21 ++++++++++++++++---
 1 file changed, 18 insertions(+), 3 deletions(-)

diff --git a/nix-system-configs/modules/system/minecraft.nix b/nix-system-configs/modules/system/minecraft.nix
index 8897782..d6628e8 100644
--- a/nix-system-configs/modules/system/minecraft.nix
+++ b/nix-system-configs/modules/system/minecraft.nix
@@ -72,9 +72,24 @@ in {
         };
 
         jvmOpts = lib.concatStringsSep " " [
-          "-Xms6048M"
-          # Use 120GB of RAM
-          "-Xmx12288M"
+          "-Xms54G"
+          # Use 120GB of RA
+          "-Xmx120G"
+
+          "-XX:+UseG1GC"
+          "-XX:+ParallelRefProcEnabled"
+          "-XX:MaxGCPauseMillis=80"
+          "-XX:+UnlockExperimentalVMOptions"
+          "-XX:+DisableExplicitGC"
+          "-XX:+AlwaysPreTouch"
+          "-XX:G1NewSizePercent=30"
+          "-XX:G1MaxNewSizePercent=50"
+          "-XX:G1HeapRegionSize=16M"
+          "-XX:G1ReservePercent=20"
+          "-XX:G1MixedGCCountTarget=4"
+          "-XX:InitiatingHeapOccupancyPercent=15"
+          "-XX:G1MixedGCLiveThresholdPercent=90"
+          "-XX:G1RSetUpdatingPauseTimePercent=5"
         ];
 
         serverProperties = {