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4年前
高峰期CMS remark阶段耗时严重, 导致服务可用性下降
jvm参数
-Xmx6144m -Xmn3072m -Xms6144m -XX:MetaspaceSize=256m -XX:MaxMetaspaceSize=512m -XX:MaxTenuringThreshold=5 -XX:SurvivorRatio=18 -XX:+UseCMSCompactAtFullCollection -XX:CMSFullGCsBeforeCompaction=1 -XX:+CMSScavengeBeforeRemark -XX:+AlwaysPreTouch -XX:+ExplicitGCInvokesConcurrent -XX:+PrintGCDetails -XX:+PrintHeapAtGC -XX:+PrintTenuringDistribution -XX:+PrintGCTimeStamps -XX:+PrintGCDateStamps -XX:+PrintFlagsFinal -XX:+HeapDumpOnOutOfMemoryError -XX:CMSInitiatingOccupancyFraction=85 -XX:+UseCMSInitiatingOccupancyOnly -XX:+UseConcMarkSweepGC -XX:+UseParNewGC -XX:+CMSParallelRemarkEnabled
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