Hello Christian, "groovie" wrote : | 5000 | 15 | Are one of the both settings responsible for the destroy | of vital connections ? | Yes it is the IdleTimeoutMinutes configuration which is destroying the idle connections, the idle connections are the connection in a pool which are not being used for some time. http://www.jboss.org/community/wiki/ConfigDataSources check this <idle-timeout-minutes> - indicates the maximum time a connection may be idle before being closed. Default is 15 minutes. Cheers, Vicky View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4269980#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...