If you are planning for migration to DB2 10, then you should make sure you read this whitepaper by IBM Distinguished Engineer John Campbell.You have to log in using your IBM ID; if you don't have one then you'll need to register. This 28-page whitepaper is based on solid customer experience and gives sound, practical advice on migration that you should be aware of. The advice on maintenance is not a 'nice to do' item but is essential for a good experience.