CV963G - DB2 11 for z/OS Application Performance and Tuning - 5 Days

Course Description

This intermediate course is designed for DB2 for z/OS application developers, DB2 for z/OS DBAs, and anyone else who is responsible for application performance and tuning in a DB2 for z/OS environment.


You should have familiarity with DB2 for z/OS application programming and SQL.


This Application Performance and Tuning course is designed to teach the students how to prevent application performance problems and to improve the performance of existing applications. Students will learn about indexes, table design, locking, and other issues relevant to application performance. This course includes paper exercises and machine exercises designed to reinforce the lecture content.

Course objectives include:

  • Design better indexes
  • Determine how to live with the optimizer (avoid pitfalls, help when necessary)
  • Avoid locking problems
  • Use accounting trace information to find significant performance problems in an operational application


For on-site courses (i.e. at your premises), we are more than happy to tailor the course agenda to suit your exact requirements. In many cases, we are able to build your in-house standards and naming conventions into the delivered course.

Course Details

Course Content
Introduction to Application Performance and Tuning
List common causes of application performance problems
Evaluate different approaches for detecting the problems
Describe possible solutions
Performance Analysis Tools
Understand components of local response time (LRT)
Identify touch random (TR), touch sequential (TS), and fetch (F) time costs
Utilize VQUBE3 to estimate local response time (LRT)
Locate necessary time values in an accounting trace report
Draw and interpret a bubble chart
Towards Better Indexes
Understand DB2 index structure and usage
Evaluate the cost of creating a new index or modifying an existing index
Design the best possible index for a single table query
Describe prefetch operations and multi-index access
Multiple Table Access
Identify various join methods and join types
Predict table join order
Design the best indexes for joining tables
Optimize correlated and non-correlated subqueries
Utilize UNION, INTERSECT, and EXCEPT operations
Towards Better Tables
Evaluate clustering alternatives
Understand basic rules of nomalization
Consider conditions for denormalization
Define materialized query tables
Learning to Live with the Optimizer
Describe the limitations related to dangerous predicates
Identify situations when the optimizer needs help with filter factor estimates
Massive Batch
Detect performance problems with massive batch jobs
Make batch jobs run faster
Locking Issues
Describe DB2 serialization
Understand transaction locking
Avoid locking problems in application design
Course Summary

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