Oracle SQL Tuning with Oracle SQLTXPLAIN

Description

Oracle SQL Tuning with SQLTXPLAIN is a practical guide to SQL tuning the way Oracle's own experts do it, using a freely downloadable tool called SQLTXPLAIN. Using this simple tool you'll learn how 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. Quickly tune any SQL statement no matter how complex. Build and tune test cases without affecting production. Use the latest tuning features with confidence. Front Matter....Pages i-xxv Introduction to SQLTXPLAIN....Pages 1-16 The Cost-Based Optimizer Environment....Pages 17-37 How Object Statistics Can Make Your Execution Plan Wrong....Pages 39-51 How Skewness Can Make Your Execution Times Variable....Pages 53-69 Troubleshooting Query Transformations....Pages 71-92 Forcing Execution Plans Through Profiles....Pages 93-109 Adaptive Cursor Sharing....Pages 111-128 Dynamic Sampling and Cardinality Feedback....Pages 129-146 Using SQLTXPLAIN with Data Guard Physical Standby Databases....Pages 147-162 Comparing Execution Plans....Pages 163-176 Building Good Test Cases....Pages 177-204 Using XPLORE to Investigate Unexpected Plan Changes....Pages 205-230 Trace Files, TRCANLZR and Modifying SQLT behavior....Pages 231-253 Running a Health Check....Pages 255-280 The Final Word....Pages 281-284 Back Matter....Pages 285-317