launch-minecraft-server-with-zgc.sh

#!/bin/zsh

PATH="/usr/lib/jvm/java-21-openjdk/bin/:$PATH" \
  java \
    -Xms24G -Xmx24G \
    \
    --add-modules=jdk.incubator.vector \
    \
    -XX:+UnlockExperimentalVMOptions \
    -XX:+UseLargePages -XX:+UseTransparentHugePages \
    \
    `# https://wiki.openjdk.org/display/zgc` \
    `# https://docs.oracle.com/en/java/javase/21/gctuning/z-garbage-collector.html` \
    `# https://krusic22.com/2020/03/25/higher-performance-crafting-using-jdk11-and-zgc/` \
    -XX:-UseParallelGC -XX:-UseG1GC \
    -XX:+UseZGC -XX:+ZGenerational \
    -XX:MaxNewSize=30 \
    -XX:SurvivorRatio=32 \
    \
    -XX:+AlwaysPreTouch \
    -XX:+DisableExplicitGC \
    -XX:+PerfDisableSharedMem \
    \
    `# https://bugs.openjdk.org/browse/JDK-8267186` \
    -XX:+UseStringDeduplication \
    \
    -Dusing.aikars.flags=https://mcflags.emc.gs \
    -Daikars.new.flags=true \
    -Djava.awt.headless=true \
    \
    -jar purpur-1.21-2235.jar \
      --world-container worlds \
      nogui