Oracle SQL Performance Tuning Tips & Techniques - 2 Days
Course Description
Give your technical staff that competitive edge with this local Oracle Workshop. This course is designed for the Oracle professional with novice or no SQL tuning skills. The focus of this tuning course is to illustrate coding techniques that insure a consistent response time between instances and releases of the Oracle database. This course works closely with performance tuning of actual SQL statements. This course supports Oracle databases up through and including Oracle19c SQL tuning topics. The course starts out with a complete overview of the Oracle architecture so students can get an understanding how their SQL and applications can take advantage of the computing environment. This course goes in-depth on understanding and controlling the explain plan (how Oracle retrieves data and in what order). The discussion includes considerable detail, with SQL examples, on how the optimizers (both rule-based and cost-based but mostly cost-based) make their decisions. Students will work with a variety of SQL statements, reviewing explain plans and making changes to make these SQL statements perform better. Lectures include index design, using hints and coding style to control the explain plans, and how to use useful tools such as index monitoring, SQL Trace, and the PL/SQL profiler. This course takes a close look at indexes: how Oracle selects them, why they are sometimes not used, and how to tell if indexes are being used/not being used. Dan says: “I feel the Indexing part of this course is worth the cost of the course alone!” The focus of this course is tuning SQL via coding style. The instructor finds that tuning in this fashion maintains the performance of the SQL when migrating to other Oracle environments (upgrades to newer releases). Lectures and topics are enhanced with live illustrations and hands-on exercises
Duration: 2 days
Prerequisites
A working knowledge of SQL. A knowledge of SQL Explain Plans is helpful but not necessary.
Topics covered include
• Oracle Architecture from a SQL Performance point-of-view • Understanding SQL Tuning Statement Topics • Reading Explain Plans/Understanding Explain Plans • Controlling both the Cost-based and Rule-based Optimizers • A close look at Indexes – how they work and how they are selected • SQL Tuning via coding style • A review of how Oracle computes row cardinality • Important CBO Statistics review • Oracle Trace Facility – collecting SQL and interpreting using TKProf • Profiling PL/SQL, PL/SQL Coding Tips • Finding problem SQL
Attendees Receive
• Study guide with presentations and relevant white papers • Tuning and problem discovery scripts • Opportunity to ask the tough Oracle questions • A hands-on opportunity to learn more about Oracle, SQL Developer, and TOAD
Day 1
- Oracle RDBMS Architecture overview
- Understanding/Reading/Interpreting Explain Plans
- Understanding the Cost-based Optimizer
- Understanding Parallel Explain Plans
- Working with Hints
- Index Review/Tips & Techniques
Day 2
- A close look at sub-query coding techniques
- SQL Coding Tips
- Where Clause and controlling Cardinality
- A close look at CBO statistics
- Hint Review/Tips & Techniques
- Tuning Tool Review: SQL Tracing/Tkprof
- Profiling and tuning PL/SQL
- PL/SQL Coding Tips
Dan Hotka
Dan Hotka is a Training Specialist and an Oracle ACE Director Alumni (a recognized outside expert/evangelist on Oracle Products) who has over 40 years in the computer industry, over 34 years of experience with Oracle products. His experience with the Oracle RDBMS dates back to the Oracle V4.0 days. Dan enjoys sharing his knowledge of the Oracle RDBMS. Dan is well published with 14 Oracle books and well over 200 published articles. He is frequently published in Oracle trade journals, regularly blogs, and speaks at Oracle conferences and user groups around the world. Dan is available for training in Ireland exclusively through Professional Training.