If you are a serious database specialist in or around Singapore, I recommend you check out the Oracle Database: Real World Scenarios - Troubleshooting and Tuning Seminar that has been put together for Oracle University by Aat van Bart. It is running on 6th & 7th Dec.
Aat is one of my ex-collegues, so I know when he talks "real world" you can be sure this is the real deal;-)
This is one of a series of special events that Oracle University in Singapore have organised. Next is Steven Feuerstein's The Best of PL/SQL.