IBM DB2 9 for z/OS: New Tools for Query Optimization

An IBM Redbooks publication

Note: This is publication is now archived. For reference only.

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Published on December 13, 2007

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ISBN-10: 0738488615
ISBN-13: 9780738488615
IBM Form #: SG24-7421-00


Authors: Paolo Bruni, Terry Berman, John Iczkovits, Basuki Soetarman, Bart Steegmans and Mike Turner

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    Abstract

    The cost-based optimizer of IBM DB2 for z/OS has continually evolved since its initial inception. Support has included new optimization algorithms, join methods, complex relational data structures, such as star schemas. DB2 for z/OS V8 has provided access path visualization and a Statistics Advisor function through a new Visual Explain.

    DB2 9 for z/OS starts addressing the challenge of reducing cost of ownership by extending query optimization through expert-based query and workload analysis, server enhancements, and an Index Advisory function. These functions are delivered with two tools: DB2 Optimization Service Center and DB2 Optimization Expert.

    This book helps you understand the installation, customization, and usage aspects of the tools. You are guided through scenarios of gradually increasing complexity where the functions of the tools are exploited for query optimization.

    Table of Contents

    Part 1. Introduction

    Chapter 1. Query optimization

    Chapter 2. Sample query optimization

    Part 2. Installation and customization

    Chapter 3. Installing Optimization Service Center

    Chapter 4. Installing Optimization Expert

    Chapter 5. Tools configuration and customization

    Part 3. Critical query detection

    Chapter 6. Profile monitoring

    Chapter 7. Workloads

    Part 4. Solution components

    Chapter 8. Query tools

    Chapter 9. Statistics Advisor

    Chapter 10. Index Advisor

    Chapter 11. Access Path Advisor and Query Advisor

    Part 5. Tuning scenarios

    Chapter 12. Analysis of a problem query

    Chapter 13. Analysis of a problem workload

    Chapter 14. Common practices

    Appendix A. Tips for optimizing very large static workloads

    Appendix B. Administrative Scheduler

    Appendix C. Relevant DB2 objects

     

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