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My IntelliJ 64bit Custom VM Options
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| # custom IntelliJ IDEA VM options | |
| # only apply for IntelliJ use JDK8, not JDK11 | |
| -server | |
| -Xms2048m | |
| -Xmx2048m | |
| -XX:NewSize=512m | |
| -XX:MaxNewSize=512m | |
| -XX:ParallelGCThreads=4 | |
| -XX:MaxTenuringThreshold=1 | |
| -XX:SurvivorRatio=8 | |
| -XX:+UseCodeCacheFlushing | |
| -XX:+UseConcMarkSweepGC | |
| -XX:+AggressiveOpts | |
| -XX:+CMSClassUnloadingEnabled | |
| -XX:+CMSIncrementalMode | |
| -XX:+CMSIncrementalPacing | |
| -XX:+CMSParallelRemarkEnabled | |
| -XX:CMSInitiatingOccupancyFraction=65 | |
| -XX:+CMSScavengeBeforeRemark | |
| -XX:+UseCMSInitiatingOccupancyOnly | |
| -XX:ReservedCodeCacheSize=240m | |
| -XX:-TraceClassUnloading | |
| -ea | |
| -Dsun.io.useCanonCaches=false |
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I use this at IntelliJ IDEA 2018 Ultime and run smoothly.