Reducing garbage collector lag?
I'm running a modded 1.18.2 Forge server, and ever since removing Valkyrien Skies, Eureka, and Create: Clockwork (they had a memory leak), the server has been consistently lagged every 5 minutes by the GC. It does this even when the memory usage is not high. There could only be one person online, and it'll start the GC exactly every 5 minutes and lag the server even when ram usage is only around 2-3gb. How do I prevent this? I have several optimization mods like ferritecore, and am using Aikar's flags, so I don't know what else I could do to mitigate this GC lag. I've ran plenty of modded servers in the past, and have never encountered rhythmic GC lag like this.
Startup flags:
java -Xms6500M -Xmx6500M -XX:+UseG1GC -XX:+ParallelRefProcEnabled -XX:MaxGCPauseMillis=200 -XX:+UnlockExperimentalVMOptions -XX:+DisableExplicitGC -XX:+UseContainerSupport -XX:G1NewSizePercent=30 -XX:G1MaxNewSizePercent=40 -XX:G1HeapRegionSize=8M -XX:G1ReservePercent=20 -XX:G1HeapWastePercent=5 -XX:G1MixedGCCountTarget=4 -XX:InitiatingHeapOccupancyPercent=15 -XX:G1MixedGCLiveThresholdPercent=90 -XX:G1RSetUpdatingPauseTimePercent=5 -XX:SurvivorRatio=32 -XX:+PerfDisableSharedMem -XX:MaxTenuringThreshold=1 -Dusing.aikars.flags=https://mcflags.emc.gs/ -Daikars.new.flags=true -Dterminal.jline=false -Dterminal.ansi=true $( [[ ! -f unix_args.txt ]] && printf %s "-jar server.jar" || printf %s "@unix_args.txt" )
https://spark.lucko.me/YymH3xgOdi1 Reply
I use the ones I got from here, they work great
https://github.com/DataDalton/Minecraft-Performance-Guide/blob/main/Java%20Arguments/README.md
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