026598d841
Optimize che-server ram usage on Docker Proposal is to set container limit to 750M for both Docker and OpenShift and tune a bit GC -XX:MaxRAMFraction=2 -XX:+UseParallelGC -XX:MinHeapFreeRatio=10 -XX:MaxHeapFreeRatio=20 -XX:GCTimeRatio=4 -XX:AdaptiveSizePolicyWeight=90 -XX:+UnlockExperimentalVMOptions -XX:+UseCGroupMemoryLimitForHeap -Dsun.zip.disableMemoryMapping=true -Xms20m Important parts -XX:MaxRAMFraction=2 -XX:+UnlockExperimentalVMOptions -XX:+UseCGroupMemoryLimitForHeap - tels jvm to use ~ CHE_MASTER_CONTAINER_RAM/MaxRAMFraction for heap We need some space for off-heap activity. During test I saw VmRSS of jvm ~330_000k - 350_000k. -XX:+UseParallelGC -XX:MinHeapFreeRatio=10 -XX:MaxHeapFreeRatio=20 -XX:GCTimeRatio=4 -XX:AdaptiveSizePolicyWeight=90 ask GC to keep heap compact in cost of some CPU. You can see changes in heap usage pattern in images below. |
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