Oracle SQL Tuning with Oracle SQLTXPLAIN (2nd Ed., 2nd ed.)
Oracle Database 12c Edition

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Language: English

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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 integration
  • Helps with SQL Monitor Report Interpretation
  • Provides a reliable method that is repeatable
  • Shows the very latest tuning features in Oracle Database 12c
  • Enables the building of test cases without affecting production

    • What You'll Learn
    • Identify how and why complex SQL has gone wrong
    • Correctly interpret AWR reports generated via SQLTXPLAIN
    • Collect the best statistics for your environment
    • Know when to invoke built-in tuning facilities
    • Recognize when tuning is not the solution
    • Spot the steps in a SQL statement's execution plan that are critical to performance of that statement
    • Modify your SQL to solve performance problems and increase the speed and throughput of production database systems
    Who This Book Is For

    Anyone 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.
    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

    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.

    Helps DBAs solve complex SQL problems

    Help developers look good to project managers

    The number of SQLT talks at user group events has been on the rise since this book's first edition in 2013