虛擬機啟動引數如下，運行環境為openjdk8，linux 64bit系統，開啟XX:+HeapDumpAfterFullGC -XX:+HeapDumpBeforeFullGC，但是在fullgc前后沒有dump檔案生成，是啥原因呀？求大佬解答。
-server -Xmx3G -Xms3G -XX:NewRatio=3 -XX:SurvivorRatio=4 -Xss256k -XX:MetaspaceSize=256M -XX:MaxMetaspaceSize=256M -XX:MaxTenuringThreshold=15 -XX:+AggressiveOpts -XX:+UseBiasedLocking -XX:+UseFastAccessorMethods -XX:+DisableExplicitGC -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:+CMSParallelRemarkEnabled -XX:CMSFullGCsBeforeCompaction=1 -XX:+UseCMSCompactAtFullCollection -XX:+UseCMSInitiatingOccupancyOnly -XX:CMSInitiatingOccupancyFraction=75 -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -XX:+PrintGCDateStamps -XX:+PrintHeapAtGC -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=8 -XX:GCLogFileSize=128M -XX:+HeapDumpAfterFullGC -XX:+HeapDumpBeforeFullGC -Xloggc:/home/logs/gc.bin -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=/home/logs
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