The JMS service in the JBoss AS uses relational databases to persist its messages. For improved performance, we should change the JMS service to take advantage of the external database. To do that, we need to replace the file jboss-as/server/production/deploy/jms-singleton/hsqldb-jdbc2-service.xml with a file in jboss-as/docs/examples/jms/ depending on your external database. Notice that if you are using the default server profile, the file path is jboss-as/server/default/deploy/jms/hsqldb-jdbc2-service.xml.