• Be sure that the server parameter connect_limit is large enough to accommodate the number of sessions required by the application. For details, see the System Administrator Guide.

• In a multiple-session application, the application can encounter deadlock against itself. For example, one session can attempt to update a table that was locked by another session.

• An application can also lock itself out in an undetectable manner. For example, if a table is updated in a transaction in one session and then selected from in another transaction in a second session, the second session waits indefinitely.