Chapter17.SQL Optimization and Performance

Chapter 17. SQL Optimization and Performance

• Access paths and optimization

• Designing indexes and SQL for performance

Tuning DB2 queries is critical to performance. You need to understand how the DB2 optimizer works and how to create the best possible indexes for your queries. You also need to know how to determine whether DB2 is using that index and whether it is performing joins and other operations effectively by using the various tools available.