WildFly JVM Settings

Internal

• WildFly

Overview

JVM settings can be declared in the server's configuration files, as shown below, and are propagated to the server JVMs.

Configuration

Standalone Mode

Modify standalone.conf as follows:

    ...
    JAVA_OPTS="-Xms1000m -Xmx2000m -XX:MetaspaceSize=256m -XX:MaxMetaspaceSize=512m ..."
    ...

Domain Mode

domain.xml

<server ...>
    ...
    <jvm java-home="..." 
            type="SUN|IBM" 
            env-classpath-ignored="true"
            debug-enabled="false"
            debug-options="...">

        <heap size="" max-size=""/>
        <permgen>...</permgen>
        <stack>...</stack>
        <agent-lib>...</agent-lib>
        <agent-path>...</agent-path>
        <java-agent>...</java-agent>
        <jvm-options>
            <option name="...">....</option>
             ...
        </jvm-options>
        <environment-variables>...</environment-variables>
        <launch-command>...</launch-command>
    </jvm>
    ...
</server>

Example:

<jvm>
    <heap size="1000m" max-size="2000m"/>
    <jvm-options>
        <option value="-server"/>
        <option value="-XX:MetaspaceSize=256m"/>
        <option value="-XX:MaxMetaspaceSize=512m"/>
    </jvm-options>
</jvm>

host.xml

host.xml allows "named" <jvm> declarations.

<host ..>
    ...
    <jvms>
        <jvm name="jvm-a" ...>
        </jvm name="jvm-b" ...>
        ...
    </jvms>
    ...
</host>