Hello everyone!
I run a solr cloud on version 5.5.1. Sometime ,the ygc time would increase from 0.1s to 10+seconds and keep 10+seconds for several hours.Even after I trigger a fullgc ,the ygc still cost 10+seconds. This happened seldom. jvm params:(java version "1.7.0_60", Java HotSpot (TM) 64-Bit Server VM(build 24.60-b09, mixed mode)) -XX:+CMSParallelRemarkEnabled -XX:+CMSScavengeBeforeRemark -XX:+ParallelRefProcEnabled -XX:+UseCMSInitiatingOccupancyOnly -XX:+UseConcMarkSweepGC -XX:+UseParNewGC -XX:+CMSFullGCsBeforeCompaction=1 -XX:+CMSInitiatingOccupancyFraction=80 -XX:ConcGCThreads=4 -XX:MaxTenuringThreshold=8 -XX:NewRatio=3 -XX:ParallelGCThreads=4 -XX:SurvivorRatio=4 -XX:TargetSurvivorRatio=90 -Xms30g -Xmx30g -Xss256k
