When you declare your datasource using a *-ds.xml file, supply min-pool-size and max-pool-size entries. For example: <datasources> | <local-tx-datasource> | <jndi-name>ds/ProductDS</jndi-name> | <connection-url>jdbc:postgresql:productdb</connection-url> | <driver-class>org.postgresql.Driver</driver-class> | <user-name>xxx</user-name> | <password>xxx</password> | <min-pool-size>5</min-pool-size> | <max-pool-size>20</max-pool-size> | </local-tx-datasource> | </datasources> | Reference: http://docs.jboss.com/jbossas/guides/j2eeguide/r2/en/html_single/#ch7.jdb... View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4051535#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...