---

id: functions-runtime-java-options title: Customize Java runtime options sidebar_label: “Customize Java runtime options” description: Customize Java runtime options in Pulsar.

:::note

This setting only applies to process runtime and Kubernetes runtime.

:::

To pass additional arguments to the JVM command line for every process started by a function worker, you can configure the additionalJavaRuntimeArguments in the conf/functions_worker.yml file as follows.

• Add JVM flags, like -XX:+ExitOnOutOfMemoryError
• Pass custom system properties, like -Dlog4j2.formatMsgNoLookups

additionalJavaRuntimeArguments: ['-XX:+ExitOnOutOfMemoryError','-Dfoo=bar']