# JRE Option

Passes command line options to the JVM at start-up.

The JRE Option property can be used to define Java system properties, which are used by applications running in the JVM, such as extensible security modules.

You can use multiple JRE Option entries in order to pass more than one option to the JVM. Permitted values include most JVM options that are defined by Sun Microsystems.

For example, this restricts the maximum heap size of the JVM to 256 megabytes: `-Xmx256m`.

## Classic Configuration

The JVM is enabled using the jre_option property in the tibemsd.conf file:

    jre_option = JVMoption

## Administration Tool

This property cannot be set using the administration tool.

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