The plugin-javaopts.conf file
The plugin-javaopts.conf file can be used to set the JAVA_OPTS environment variable for automation plug-ins that use Groovy.
By default, the plugin-javaopts.conf file is stored on the agent computer in the agent_installation_directory/conf/ folder. You can use the plugin-javaopts.conf file to set the JAVA_OPTS environment variable for a plug-in that is different from the JAVA_OPTS variable for the agent process itself. The plug-in must use Groovy, and not Java™.
If you use the IBM Java Runtime Environment (JRE) to run the agent, you might achieve faster step execution times by adding the -Xquickstart parameter to the plugin-javaopts.conf file. For information about this parameter, see https://www.ibm.com/support/knowledgecenter/SSYKE2_8.0.0/com.ibm.java.zos.80.doc/diag/appendixes/cmdline/xquickstart.html.