Performance issues in WildFly11 as my 90% for jmeter run gets increased to 2x for same set of run as it was in Jboss. --------------------------------------------------------------------------------------------------------------------- Key: WFLY-9835 URL: https://issues.jboss.org/browse/WFLY-9835 Project: WildFly Issue Type: Bug Components: JMS, Server Reporter: nilesh ratta Assignee: Jason Greene Priority: Major Attachments: J-img3.png, J_img1.png, J_img2.png, Jboss_GClog.png, W_img1.png, W_img2.png, W_img3.png, WildFly11_GCLog.png I have upgraded my application from Jboss6 with java 6 to WildFly11 with java 8 in dev environment. Note : I am facing some performance issues in WildFly11 as my 90% gets increased for same set of run as it was in Jboss. *And minor GC gets increased to 7 times as it was in jboss.* And there is no application level code changes in wildfly11. *Please find attached files for GC log and Heap dump related inputs.* Inputs : JVM parameters : Parallel GC with 4 threads , -Xmx6144m Xmx6144m -XX:NewRatio=1 -XX:ParallelGCThreads=4 -XX:MetaspaceSize=96M -XX:MaxMetaspaceSize=1024m Parameters are same in Jboss 6 and WildFly11. Jmeter result overview for 100 users in 15 mnts with 250 sec rampup time. As all of our app server is on AWS with same configuration. 1. Jboss 6 results : Label Count Average 90%_line Min Max Error% ThroughPut TOTAL 48664 167 418 0 30374 0 53.80 2. WildFLy11 results : Label Count Average 90%_line Min Max Error% ThroughPut TOTAL 54775 287 887 0 14286 0 60.672 Note : As my count nd throughput increases but my* 90% is > 2x * for WildFly11. Kindly find the attached files for Heap dump as follows with following names in .png format:- For WildFly 11 : 1. W_img1.png :- WildFly11_DominatorTree : io.netty.buffer.PoolChunk ????? 2. W_img2.png WildFly_Histogram : Class Name| Objects | Shallow Heap | Retained Heap byte[] | 53,925 | 163,144,832 | >= 163,144,832 3. W_img3.png WildFly_Immediate Dominators for byte [] : For Jboss -6 1. J_img1.png :- Jboss6_DominatorTree : as there is no io.netty.buffer.PoolChunk ..... 2. J_img2.png :- Jboss6_Histogram 3. J_img3.png : Jboss6_Immediate Dominators for byte [] : Kindly find GC log images for wildFly 11 and jboss 6 .for 15 mnts load run . Wildfly 11 ------------ Jboss 6 Total GC :-------- 1167 ------------- 174 Total GC Time :-------- >21 sec ------------- 6 sec Total Reclaimed Bytes :------ 3.32 tb ------------ 480 gb