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

[James Perkins (JIRA)]

    [ https://issues.jboss.org/browse/WFLY-9456?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13481350#comment-13481350 ] 

James Perkins commented on WFLY-9456:
-------------------------------------

Is there anyway you could test with the Oracle JDK to see if it has the same issue?

Also the exact version of the JVM you're running may be helpful. Below is what I have.

{code}
[root at localhost ~]# dnf info java-1.8.0-openjdk
Last metadata expiration check: 0:25:39 ago on Tue 24 Oct 2017 08:10:57 AM PDT.
Installed Packages
Name         : java-1.8.0-openjdk
Epoch        : 1
Version      : 1.8.0.144
Release      : 7.b01.fc26
Arch         : x86_64
Size         : 495 k
Source       : java-1.8.0-openjdk-1.8.0.144-7.b01.fc26.src.rpm
Repo         : @System
>From repo    : updates
Summary      : OpenJDK Runtime Environment
URL          : http://openjdk.java.net/
License      : ASL 1.1 and ASL 2.0 and GPL+ and GPLv2 and GPLv2 with exceptions and LGPL+ and LGPLv2 and MPLv1.0 and MPLv1.1 and Public Domain and W3C
Description  : The OpenJDK runtime environment.
{code}

> 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.



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