WildFly JVM Settings
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Internal
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>