Java Docker Images & JVM Arguments

Reference: https://github.com/Mukul1127/Minecraft-Performance-Flags-Benchmark

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If you are on Java 11+ (1.12+) weWe recommend the following arguments for all Servers

-XX:+UnlockExperimentalVMOptions -XX:+UnlockDiagnosticVMOptions -XX:+AlwaysActAsServerClassMachine -XX:+AlwaysPreTouch -XX:+DisableExplicitGC -XX:NmethodSweepActivity=1 -XX:ReservedCodeCacheSize=400M -XX:NonNMethodCodeHeapSize=12M -XX:ProfiledCodeHeapSize=194M -XX:NonProfiledCodeHeapSize=194M -XX:-DontCompileHugeMethods -XX:MaxNodeLimit=240000 -XX:NodeLimitFudgeFactor=8000 -XX:+UseVectorCmov -XX:+PerfDisableSharedMem -XX:+UseFastUnorderedTimeStamps -XX:+UseG1GC -XX:MaxGCPauseMillis=130 -XX:+DisableExplicitGC -XX:+AlwaysPreTouch50 -XX:G1NewSizePercent=2830 -XX:G1MaxNewSizePercent=70 -XX:G1HeapRegionSize=16M4M -XX:G1ReservePercent=InitiatingHeapOccupancyPercent=20 -XX:G1MixedGCCountTarget=3 -XX:InitiatingHeapOccupancyPercent=10 -XX:G1MixedGCLiveThresholdPercent=90 -XX:G1RSetUpdatingPauseTimePercent=0 -XX:SurvivorRatio=32 -XX:MaxTenuringThreshold=1 -XX:G1SATBBufferEnqueueingThresholdPercent=30 -XX:G1ConcMarkStepDurationMillis=5.0 -XX:G1ConcRefinementServiceIntervalMillis=150 -XX:G1ConcRSHotCardLimit=16 -XX:AllocatePrefetchStyle=3

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If you are on Java 8 (<1.12) we recommend the following arguments

-XX:+UnlockExperimentalVMOptions -XX:+UnlockDiagnosticVMOptions -XX:+AlwaysActAsServerClassMachine6 -XX:+ParallelRefProcEnabled -XX:+DisableExplicitGCUseStringDeduplication -XX:+AlwaysPreTouch -XX:+PerfDisableSharedMem -XX:+AggressiveOpts -XX:+UseFastAccessorMethods -XX:MaxInlineLevel=MaxHeapFreeRatio=15 -XX:MaxVectorSize=32MinHeapFreeRatio=5 -XX:+UseCompressedOopsDjava.net.preferIPv4Stack=true -XX:ThreadPriorityPolicy=1Dfml.ignoreInvalidMinecraftCertificates=true -XX:+UseDynamicNumberOfGCThreads -XX:NmethodSweepActivity=1 -XX:ReservedCodeCacheSize=350M -XX:-DontCompileHugeMethods -XX:MaxNodeLimit=240000 -XX:NodeLimitFudgeFactor=8000 -XX:+UseFPUForSpillingDfml.ignorePatchDiscrepancies=true

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Full default forced arguments (can't be modified)

java -Xmx{{SERVER_MEMORY}}M {{JVM_ARGS}} -Dterminal.jline=false -Dterminal.ansi=true -jar server.jar

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Java Docker Images

If you get the following error, you are most likely on the incorrect Docker Java image for the MC version you are running

Available Docker Images Listed Below