Just to update, we solved the issue of Azul Zing JDK with -XX:GPGCTargetPeakHeapOccupancyPercent=95
Our jvm.conf right now:
-Dio.netty.noKeySetOptimization=true
-Dio.netty.noUnsafe=true
-Dio.netty.recycler.maxCapacityPerThread=0
-Djava.awt.headless=true
-Djna.nosys=true
-Dlog4j.shutdownHookEnabled=false
-Dlog4j2.disable.jmx=true
-XX:+AlwaysPreTouch
-XX:+HeapDumpOnOutOfMemoryError
-XX:-OmitStackTraceInFastThrow
-XX:GPGCTargetPeakHeapOccupancyPercent=95
-Xloggc:/var/log/elasticsearch/dba/gc.log
-Xms32g
-Xmx32g
-Xss1m
-server
-verbose:gc