Oracle SQL Tuning with Oracle SQLTXPLAIN

Oracle SQL Tuning with Oracle SQLTXPLAIN: Oracle Database 12c Edition helps DBAs and developers work faster and more accurately, allowing complex projects to be completed within today's tighter budgets and timescales. In the past both developers and DBAs have used trial and error to solve performance problems, a slow and error-prone process which can look like groping around in the dark. Learning SQLTXPLAIN and the method in this book will turn every DBA and SQL developer into a superhero, able to solve complicated tuning problems faster than ever before, and give them the potential to save projects from expensive performance disasters. New chapters on AWR and statistics will help DBAs also avoid problems before they even begin.

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

Autorentext
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.

Inhalt

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.