Charalambides Oracle SQL Tuning with Oracle SQLTXPLAIN

Oracle Database 12c Edition
2. Auflage 2017
ISBN: 978-1-4842-2436-6
Verlag: APRESS
Format: PDF
Kopierschutz: 1 - PDF Watermark

E-Book, Englisch, 408 Seiten, eBook

Learn through this practical guide to SQL tuning how Oracle's own experts do it, using a freely downloadable tool called SQLTXPLAIN. This new edition has been expanded to include AWR, Oracle 12c Statistics, interpretation of SQL Monitor reports, Parallel execution, and Exadata-related features. Reading this book and using SQL helps you learn to tune even the most complex SQL, and you'll learn to do it quickly, without the huge learning curve usually associated with tuning as a whole.Firmly based in real-world problems, this book helps you reclaim system resources and avoid the most common bottleneck in overall performance, badly tuned SQL. You'll learn how the optimizer works, how to take advantage of its latest features, and when it's better to turn them off. Best of all, the book is updated to cover the very latest feature set in Oracle Database 12c.Covers AWR report integrationHelps with SQL Monitor Report InterpretationProvides a reliablemethod that is repeatableShows the very latest tuning features in Oracle Database 12cEnables the building of test cases without affecting productionWhat You'll LearnIdentify how and why complex SQL has gone wrongCorrectly interpret AWR reports generated via SQLTXPLAINCollect the best statistics for your environmentKnow when to invoke built-in tuning facilitiesRecognize when tuning is not the solutionSpot the steps in a SQL statement's execution plan that are critical to performance of that statementModify your SQL to solve performance problems and increase the speed and throughput of production database systemsWho This Book Is ForAnyone who deals with SQL and SQL tuning. Both developers and DBAs will benefit from learning how to use the SQLTXPLAIN tool, and from the problem solving methodology in this book.

Zielgruppe

Popular/general

Autoren/Hrsg.

Charalambides, Stelios

Inhaltsverzeichnis

1. Introduction.- 2. AWR: Your Guide on What to do Next.- 3. The Cost-Based Optimizer Environment.- 4. How Object Statistics Can Make Your Execution Plan Wrong.- 5. How Skewness Can Make Your Execution Times Variable.- 6. Collecting Good Oracle 12c Statistics.- 7. Tracing CBO Decisions, Hints and Query Transformations using 10053.- 8. Forcing Execution Plans Through Profiles.- 9. Adaptive Cursor Sharing.- 10. How To Work with Adaptive Plans.- 11. Dynamic Statistics.- 12. Directives and Statistics Feedback.- 13. Parallel Execution.- 14. SQL Monitor Active Reports.- 15. Using SQLTXPLAIN with an Active Data Environment.- 16. Building Good Test Cases.- 17. Using XPLORE to Investigate Unexpected Plan Changes.- 18. Trace Files, TRCANLZR and Modifying SQLT Behavior.- 19. Comparing Execution Plans.- 20. Running a Health Check.- 21. The Final Word.- 22. Appendix A. Installing SQLTXPLAIN.- 23. Appendix B. The CBO Parameters (11.2.0.1).- 24. Appendix C. Tool Configuration Parameters and the Express Methods.

Über Autor(innen)

Stelios Charalambides has more than 20 years experience working with Oracle databases. He is OCP certified and has worked as a senior Consultant and database administrator (DBA) on both sides of the Atlantic. His experience includes dealing with all aspects of system design, implementation and post production support, solving practical problems in a wide variety of environments. He works as an Exadata Oracle Support Engineer developing time-critical solutions for tier-one customers with high profile performance problems.