Since 1995, Christian Antognini has been focusing on understanding how the Oracle database engine works. His main interests range from logical and physical database design, the integration of databases with Java applications, to the cost-based optimizer and basically everything else related to performance management and tuning. He is currently working as a senior consultant and trainer at Trivadis AG (http://www.trivadis.com) in Zürich, Switzerland. If he is not helping one of his customers to get the most out of Oracle, he is somewhere lecturing on optimization or new Oracle database features for developers. In addition to classes and seminars organized by Trivadis he regularly presents at conferences and user-group meetings. For example, during 2006 he presented at Hotsos Symposium (USA), Miracle Database Forum (DK), UKOUG Conference (UK) and DOAG Konferenz (DE).