Nix configurations for my homelab
Add JVM argument optimizations to harpy express minecraft server
author
yemou
date
(May 2, 2026, 2:19 PM -0400)
commit
68483e70
68483e70ae6dde7d33e83b7a93ff1e8bde42ba9c
parent
7ea1db13
7ea1db13d330895e5050cd638d0c7a4d8ee23038
+11
-6
+11
-6
modules/services/minecraft/harpy-express.nix
+11
-6
modules/services/minecraft/harpy-express.nix
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{ pkgs, ... }:
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{ lib, pkgs, ... }:
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{
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networking.firewall = {
···
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{
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enable = true;
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package = pkgs.fabricServers.fabric-1_21_1;
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jvmOpts = "-Xmx2G -Xms1G";
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operators.yemou = {
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uuid = "12069472-23e7-48a8-b893-461483a4da88";
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bypassesPlayerLimit = true;
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};
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jvmOpts = lib.strings.concatStringsSep " " [
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"-Xmx2G -Xms2G -XX:+UnlockExperimentalVMOptions -XX:+UnlockDiagnosticVMOptions"
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"-XX:+AlwaysActAsServerClassMachine -XX:+AlwaysPreTouch -XX:+DisableExplicitGC -XX:+UseNUMA"
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"-XX:NmethodSweepActivity=1 -XX:ReservedCodeCacheSize=400M -XX:NonNMethodCodeHeapSize=12M"
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"-XX:ProfiledCodeHeapSize=194M -XX:NonProfiledCodeHeapSize=194M -XX:-DontCompileHugeMethods"
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"-XX:MaxNodeLimit=240000 -XX:NodeLimitFudgeFactor=8000 -XX:+UseVectorCmov -XX:+PerfDisableSharedMem"
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"-XX:+UseFastUnorderedTimeStamps -XX:+UseCriticalJavaThreadPriority -XX:ThreadPriorityPolicy=1"
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"-XX:+UseZGC -XX:AllocatePrefetchStyle=1 -XX:-ZProactive -XX:+UseTransparentHugePages"
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];
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operators.yemou.uuid = "12069472-23e7-48a8-b893-461483a4da88";
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serverProperties = {
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allow-flight = true;
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allow-nether = false;