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self-hosting/minecraft/papermc/entrypoint.sh

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#!/usr/bin/env bash
# Accept the EULA
echo "eula=true" > /app/config/eula.txt
# Log the last-used version, so we know which version to use when running it again (e.g. loading the backup)
echo "${MC_VERSION}, PaperMC v${PAPERMC_VERSION}" >> /app/config/versions.txt
XMS="${XMS:-$XMX}"
# Launch the actual server
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exec java \
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-Xms"${XMS}G" \
-Xmx"${XMX:-$XMS}G" \
-XX:+UseG1GC \
-XX:+ParallelRefProcEnabled \
-XX:MaxGCPauseMillis=200 \
-XX:+UnlockExperimentalVMOptions \
-XX:+DisableExplicitGC \
-XX:+AlwaysPreTouch \
-XX:G1NewSizePercent="$([ $XMS -gt 12 ] && echo 40 || echo 30)" \
-XX:G1MaxNewSizePercent="$([ $XMS -gt 12 ] && echo 50 || echo 40)" \
-XX:G1HeapRegionSize="$([ $XMS -gt 12 ] && echo 16 || echo 8)"M \
-XX:G1ReservePercent="$([ $XMS -gt 12 ] && echo 15 || echo 20)" \
-XX:G1HeapWastePercent=5 \
-XX:G1MixedGCCountTarget=4 \
-XX:InitiatingHeapOccupancyPercent="$([ $XMS -gt 12 ] && echo 20 || echo 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 \
-jar /app/server.jar \
--universe /app/worlds \
--nogui