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Mastering PostgreSQL 15

You're reading from   Mastering PostgreSQL 15 Advanced techniques to build and manage scalable, reliable, and fault-tolerant database applications

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Product type Paperback
Published in Jan 2023
Publisher Packt
ISBN-13 9781803248349
Length 522 pages
Edition 5th Edition
Languages
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Author (1):
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Hans-Jürgen Schönig Hans-Jürgen Schönig
Author Profile Icon Hans-Jürgen Schönig
Hans-Jürgen Schönig
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Toc

Table of Contents (16) Chapters Close

Preface 1. Chapter 1: PostgreSQL 15 Overview 2. Chapter 2: Understanding Transactions and Locking FREE CHAPTER 3. Chapter 3: Making Use of Indexes 4. Chapter 4: Handling Advanced SQL 5. Chapter 5: Log Files and System Statistics 6. Chapter 6: Optimizing Queries for Good Performance 7. Chapter 7: Writing Stored Procedures 8. Chapter 8: Managing PostgreSQL Security 9. Chapter 9: Handling Backup and Recovery 10. Chapter 10: Making Sense of Backups and Replication 11. Chapter 11: Deciding on Useful Extensions 12. Chapter 12: Troubleshooting PostgreSQL 13. Chapter 13: Migrating to PostgreSQL 14. Index 15. Other Books You May Enjoy

Optimizing Queries for Good Performance

In Chapter 5, Log Files and System Statistics, you learned how to read system statistics and how to make use of what PostgreSQL provides. Now that we are armed with this knowledge, this chapter is all about good query performance. Everybody is looking for good query performance. Therefore, it is important to address this topic in an in-depth way.

In this chapter, you will learn about the following topics:

  • Learning what the optimizer does
  • Understanding execution plans
  • Understanding and fixing joins
  • Enabling and disabling optimizer settings
  • Partitioning data
  • Adjusting parameters for good query performance
  • Making use of parallel queries
  • Introducing just-in-time (JIT) compilation

By the end of this chapter, we will be able to write better and faster queries. If the queries still aren’t very good, we should be able to understand why this is the case. We will also be able to use the new techniques...

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