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How to Influence the DB2 Query Optimizer Using Optimization Profiles (A01)

Topic: 2006 NA

Subtopic: DB2 for LUW



DATE: 2006-5-8 (10:20 AM - 11:30 AM)
SPEAKERS: Tom Eliaz (DB2 UBD for LUW Query Optimizer Organization )

The DB2 optimizer is one of the most sophisticated in the industry; however, even after perfect performance tuning, it can occasionally "get it wrong." This talk teaches you how to use optimization profiles to directly influence the optimizer's choice of access method, join method, and join order.

EXP. LEVEL: Advanced

OBJECTIVES:

How to influence the optimizer's choice of access method, join method, and join order

How to influence the query rewrite transformations applied by the optimizer

How to put optimization profiles into effect without making application changes

How to determine which optimization profiles were applied, and why others were not

Basic optimizer tuning tips



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