satr14/nix-flake
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update modpack and perf tweaks
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Satria 2026-06-24 11:33:49 +07:00
commit 2fa86ba6b2
1 changed files with 9 additions and 8 deletions
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modules/system/homelab/mc.nix
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@ -4,10 +4,10 @@
ram-allocation-mb = 12288;
rcon-pass = "howdy";
modpack = let
commit = "e47a428b61fc087f4c733258e5a282c21b32d9c3";
commit = "583df6751eb0b88830fa7e4a424587aedc241653";
path = if production then "commit/${commit}" else "branch/main";
in pkgs.fetchPackwizModpack {
packHash = "sha256-/gQw/FeNv/jbschhFzujloO9jaqTmfvBbzouWUJGr6w=";
packHash = "";
url = "https://git.satr14.my.id/satr14/server-modpack/raw/${path}/pack.toml";
};
in {
@ -20,9 +20,10 @@ in {
"vm.swappiness" = 10;
};
systemd.services."minecraft-server-${name}".environment = {
LD_LIBRARY_PATH = "${pkgs.stdenv.cc.cc.lib}/lib";
}; # ^^^ physics mod fix
systemd.services."minecraft-server-${name}" = {
environment.LD_LIBRARY_PATH = "${pkgs.stdenv.cc.cc.lib}/lib"; # physics toys mod fix
serviceConfig.Nice = -5; # higher scheduling priority
};
services.minecraft-servers = {
enable = true;
@ -141,10 +142,10 @@ in {
"-XX:+AlwaysPreTouch" # Pre-allocates memory on startup, OS claims it immediately for JVM instead of negotiating it
"-XX:+DisableExplicitGC" # Disables mods from manually invoking the GC
"-XX:+PerfDisableSharedMem" # Disables constant /tmp writes for JVM metrics
"-XX:ZAllocationSpikeTolerance=5" # Helps when server is active with many players
"-XX:SoftMaxHeapSize=${toString (ram-allocation-mb - 2048)}M" # Leave 2GB headroom
"-XX:ZCollectionInterval=1" # Force a GC cycle at minimum every second
"-XX:ConcGCThreads=8" # Threads ZGC uses for concurrent work
# "-XX:ZAllocationSpikeTolerance=5" # Helps when server is active with many players
# "-XX:ZCollectionInterval=1" # Force a GC cycle at minimum every second
# "-XX:ConcGCThreads=8" # Threads ZGC uses for concurrent work
]; in lib.concatStringsSep " " flags;
};
};