Kurs informasjon: DB2 9 for z/OS Application Performance and Tuning

This course replaces course (CV960NO). This is the Classroom version of Instructor-led Online course (3V961NO).

This course is designed to teach the students how to prevent application performance problems and to improve the performance of existing applications.

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This course teaches you how to prevent application performance problems and to improve the performance of existing applications.

Appropriate audience is DB2 for z/OS application developers, DB2 for z/OS DBAs and anyone else with a responsibility for application performance and tuning in a DB2 for z/OS environment.

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

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

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Introduction to Application Performance and Tuning

Why Performance Disappoints

• Causes of Performance Problems
• A Simple Example
• SQL EXPLAIN Information
• Modify the Index
• The Accounting Trace
• Accounting Trace Information
• Filter Factors
• Another Index Modification
• Who Detects Problems?
• When Should Problems be Detected?
• VQUBE2
• What is a Touch?
• Further Analysis (1 of 2)
• Further Analysis (2 of 2)
• The Message

Performance Analysis Tools

• Components of Response Time
• Methodology Formulas
• VQUBE2
• Simple Example in VQUBE2
• SQL EXPLAIN
• The Plan Table
• Running the Explain
• Interpreting the Results
• The Accounting Trace
• Reading an Accounting Trace
• The Bubble Chart
• Monitoring Execution
• Performance Thresholds
• Tuning Potential

Towards Better Indexes

• Section 3.1 DB2 Index Structure and Usage, Part 1
• Section 3.2 DB2 Index Structure and Usage, Part 2
• Section 3.3 Tuning Methodology and Index Cost
• Section 3.4 Lab 1: Customer Order Application
• Section 3.5 Index Design
• Section 3.6 Lab 2: Poorly Performing Application
  • Machine Exercise 1 - Designing Indexes

• Section 3.7 Advanced Access Paths

Multiple Table Access

• Section 4.1 Joining Issues
• Section 4.2 Lab 3: Joining Tables
• Section 4.3 Subqueries and Global Query Optimization
• Section 4.4 Lab 4: Different Implementations of One Problem
• Section 4.5 Union, Except, and Intersect
  • Machine Exercise 2 - Subqueries

Towards Better Tables

• Section 5.1 Table Design
• Section 5.2 Materialized Query Tables
  • Machine Exercise 3 - MQTs and Denormalized Tables

Learning to Live with the Optimizer

• Section 6.1 Dangerous Predicates
  • Machine Exercise 4 - NonIndexable and NonBoolean Predicates

• Section 6.2 Lab 5: Introduction to Browsing
• Section 6.3 Filter Factors
• Section 6.4 Helping the Optimizer
  • Machine Exercise 5 - Helping the Optimizer

Massive Batch

• Section 7.1 Batch Performance Issues
• Section 7.2 Benefit Analysis
• Section 7.3 Massive Deletes

Locking Issues

• Section 8.1 Serialization
• Section 8.2 Transation Locking
• Section 8.3 Application Design
  • Machine Exercise 6 - Locking Issues

Course Summary

Components of CPU Time

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