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IBM DB2 9.7 Advanced Application Developer Cookbook

You're reading from IBM DB2 9.7 Advanced Application Developer Cookbook

Product type Book

Published in Mar 2012

Publisher Packt

ISBN-13 9781849683968

Pages 442 pages

Edition 1st Edition

Languages

Concepts

Application Development

Table of Contents (15) Chapters

IBM DB2 9.7 Advanced Application Developer Cookbook

Credits

About the Authors

About the Reviewers

www.PacktPub.com

Preface

1. Application Development Enhancements in DB2 9.7

2. DB2 Application Techniques

3. General Application Design

4. Procedures, Functions, Triggers, and Modules

5. Designing Java Applications

6. DB2 9.7 Application Enablement

7. Advanced DB2 Application Features and Practices

8. Preparing and Monitoring Database Applications

9. Advanced Performance Tuning Tips

Interpreting db2exfmt output

In the previous recipe, we discussed how to use different explain utilities. db2exfmt is the most commonly-used utility for troubleshooting a performance problem. This utility gives very detailed information captured in EXPLAIN tables in the form of an ASCII text report. This report contains textual information, as well as the access plan in a graphical format, which is extremely useful for query analysis. In this recipe, we will discuss how to interpret the results from the db2exfmt utility.

How to do it...

As mentioned in the previous recipe, the output of the db2exfmt tool contains very detailed information about the query execution plan. In this section, we will discuss how to interpret each section.

1. Verifying the database information: The top section of the db2exfmt output contains DB2 version information, and the time when the db2exfmt tool was run.
2. Check the database context area: This section contains the configuration parameter values that have...

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