[jboss-jira] [JBoss JIRA] (WFLY-9456) High non heap memory consumption

High non heap memory consumption -------------------------------- Key: WFLY-9456 URL: https://issues.jboss.org/browse/WFLY-9456 Project: WildFly Issue Type: Bug Components: Class Loading Affects Versions: 11.0.0.CR1, 11.0.0.Final Environment: CentOS 7 on Google compute engine VM openjdk version "1.8.0_144" OpenJDK Runtime Environment (build 1.8.0_144-b01) OpenJDK 64-Bit Server VM (build 25.144-b01, mixed mode) Reporter: Klaus Erber Assignee: David Lloyd Attachments: wf10-nmt.txt, wf11-nmt.txt After a clean install of WF11CR1 without any configuration changes and startup with standalone.sh we see a high memory usage on the system side (about 800 MB). Wenn we do the same with WF10Final we see a memory usage of about 210 MB. Her are the output auf ps aux: wf11 ke4 1652 14.0 22.1 2863404 *801620* pts/3 Sl+ 14:01 0:07 java -D[Standalone] -server -Xms64m -Xmx512m -XX:MetaspaceSize=96M -XX:MaxMetaspaceSize=256m wf10 ke4 1836 42.1 5.7 2687744 *209204* pts/2 Sl+ 14:02 0:06 java -D[Standalone] -server -Xms64m -Xmx512m -XX:MetaspaceSize=96M -XX:MaxMetaspaceSize=256m The result is, that we can only start 3 instances of wildfly 11 on a 3.75 GB VM. The 4th instance crashes the system. In our real scenario (Wildfly instances in docker containers hosting the REST interface for our application) we see about 1 GB memory consumption per backend node. The heap and other memory pools not seems to be the reason for this behaviour - see the attached native memory tracking results.