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Overview

This course is designed to teach the students how to prevent SQL performance problems and how to improve the performance of existing SQL.
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What You'll Learn

After completing this course, students will be able to:

  • Understand and design better indexes
  • Determine how to work with the optimizer (avoid pitfalls, provide guidance)
  • Optimize multi-table access
  • Work with subqueries
  • Avoid locking problems
  • Use accounting traces and other tools to locate performance problems in existing SQL
  • and more

Who Should Attend

This course is for Db2 12 for z/OS application developers, Db2 12 for z/OS DBAs, and anyone else with a responsibility for SQL performance and tuning in a Db2 12 for z/OS environment.
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Prerequisites

  • Familiarity with SQL
  • Familiarity with Db2 12 for z/OS
  • Familiarity with Db2 12 for z/OS application programming

Learning Journey

Coming Soon...

1. Introduction to SQL performance and tuning

  • Performance issues
  • Simple example
  • Visualizing the problem
  • Summary

2. Performance analysis tools

  • Components of response time
  • Time estimates with VQUBE3
  • SQL EXPLAIN
  • The accounting trace
  • The bubble chart
  • Performance thresholds

3. Index basics

  • Indexes
  • Index structure
  • Estimating index I/Os
  • Clustering index
  • Index page splits

4. Access paths

  • Classification
  • Matching versus Screening
  • Variations
  • Hash access
  • Prefetch
  • Caveat

5. More on indexes

  • Include index
  • Index on expression
  • Random index
  • Partitioned and partitioning, NPSI and DPSI
  • Page range screening
  • Features and limitations

6. Tuning methodology and index cost

  • Methodology
  • Index cost: Disk space
  • Index cost: Maintenance
  • Utilities and indexes
  • Modifying and creating indexes
  • Avoiding sorts

7. Index design

  • Approach
  • Designing indexes

8. Advanced access paths

  • Prefetch
  • List prefetch
  • Multiple index access
  • Runtime adaptive index

9. Multiple table access

  • Join methods
  • Join types
  • Designing indexes for joins
  • Predicting table order

10. Subqueries

  • Correlated subqueries
  • Non-correlated subqueries
  • ORDER BY and FETCH FIRST with subqueries
  • Global query optimization
  • Virtual tables
  • Explain for subqueries

11. Set operations (optional)

  • UNION, EXCEPT, and INTERSECT
  • Rules
  • More about the set operators
  • UNION ALL performance improvements

12. Table design (optional)

  • Number of tables
  • Clustering sequence
  • Denormalization
  • Materialized query tables (MQTs)
  • Temporal tables
  • Archive enabled tables

13. Working with the optimizer

  • Indexable versus non-indexable predicates
  • Boolean versus non-Boolean predicates
  • Stage 1 versus stage 2
  • Filter factors
  • Helping the optimizer
  • Pagination

14. Locking issues

  • The ACID test
  • Reasons for serialization
  • Serialization mechanisms
  • Transaction locking
  • Lock promotion, escalation, and avoidance

15. More locking issues (optional)

  • Skip locked data
  • Currently committed data
  • Optimistic locking
  • Hot spots
  • Application design
  • Analyzing lock waits

16. Massive batch (optional)

  • Batch performance issues
  • Buffer pool operations
  • Improving performance
  • Benefit analysis
  • Massive deletes

This course is not associated with any Certification.

Frequently Asked Questions (FAQs)

  • Why get IBM certified?

    IBM certifications validate your skills and expertise in a wide range of technologies, including hybrid cloud, data & AI, security, IT infrastructure, and business applications.

    These certifications are globally recognized and can help you advance your career, increase your earning potential, and demonstrate your commitment to professional development.

    IBM-certified professionals are in high demand, making them valuable assets to any organization seeking to leverage IBM's innovative solutions.

  • What to expect for the examination?

    IBM offers a variety of certification exams at different levels (Basic, Intermediate, and Advanced) covering various technologies and job roles.

    Exams typically consist of multiple-choice questions and may include scenario-based questions that assess your ability to apply your knowledge in real-world situations.

    Note: Certification requirements and policies may be updated by IBM from time to time. We apologize for any discrepancies; do get in touch with us if you have any questions.

  • How long is IBM certification valid for?

    The validity period of IBM certifications varies. Some certifications, particularly those focused on specific product versions or technologies, may have expiration dates.

    However, many IBM certifications, especially those focused on broader skills or newer technologies, do not have an expiration date.

    Note: Certification requirements and policies may be updated by IBM from time to time. We apologize for any discrepancies; do get in touch with us if you have any questions.

  • Why take this course with Trainocate?

    Here’s what sets us apart:

    - Global Reach, Localized Accessibility: Benefit from our geographically diverse training hubs in 16 countries (and counting!).

    - Top-Rated Instructors: Our team of subject matter experts (with high average CSAT and MTM scores) are passionate to help you accelerate your digital transformation.

    - Customized Training Solutions: Choose from on-site, virtual classrooms, or self-paced learning to fit your organization and individual needs.

    - Experiential Learning: Dive into interactive training with our curated lesson plans. Participate in hands-on labs, solve real-world challenges, and take on comprehensive assessments.

    - Learn From The Best: With 30+ authorized training partnerships and countless awards from Microsoft, AWS, Google – you're guaranteed learning from the industry's elite.

    - Your Bridge To Success: We provide up-to-date course materials, helpful exam guides, and dedicated support to validate your expertise and elevate your career.

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Exam & Certification

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