Flags Generator

Generate optimized JVM flags for your server.

Optimize your Minecraft server startup flags to ensure high performance and avoid garbage collection (GC) lag spikes.

Choose your RAM, Java version, and server core — an optimized startup script will be generated automatically. Copy the command to your panel and paste it into the Startup field.

Flags Generator

4G RAM · Modern

Server RAM

Java Version

Server Core

bash · startup command

java -Xms4G -Xmx4G -XX:+UseG1GC -XX:+ParallelRefProcEnabled -XX:MaxGCPauseMillis=200 -XX:+UnlockExperimentalVMOptions -XX:+DisableExplicitGC -XX:+AlwaysPreTouch -XX:G1NewSizePercent=30 -XX:G1MaxNewSizePercent=40 -XX:G1HeapRegionSize=8M -XX:G1ReservePercent=20 -XX:InitiatingHeapOccupancyPercent=15 -XX:G1MixedGCCountTarget=4 -XX:G1MixedGCLiveThresholdPercent=90 -XX:G1RSetUpdatingPauseTimePercent=5 -XX:SurvivorRatio=32 -XX:+PerfDisableSharedMem -XX:MaxTenuringThreshold=1 -XX:+UseStringDeduplication -XX:+UseCompressedOops -XX:+OptimizeStringConcat -XX:+UseFastJNIAccessors -XX:+UseThreadPriorities -XX:+OmitStackTraceInFastThrow -XX:+TrustFinalNonStaticFields -XX:ThreadPriorityPolicy=1 -Xlog:async -jar server.jar nogui

Note: this flag combination is optimized for Arqonara infrastructure (AMD EPYC / Ryzen 9). If you move to another provider, some flags may need to be adjusted.

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