Change Oracle DB Console logout timeout

For DB Control, you should set it in:

$ORACLE_HOME/oc4j/j2ee/oc4j_applications/applications/em/em/WEB-INF/web.xml
and set the following parameter to -1 (no limit):   <session-config>       <session-timeout>-1</session-timeout>  </session-config> 

or if you like, you can specify a positive number to indicate the number of minutes before timeout.