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Learn PostgreSQL

You're reading from Learn PostgreSQL Use, manage, and build secure and scalable databases with PostgreSQL 16

Product type Paperback

Published in Oct 2023

Publisher Packt

ISBN-13 9781837635641

Length 744 pages

Edition 2nd Edition

Languages

SQL

Tools

PostgreSQL

Concepts

Data Analysis

Authors (2):

Luca Ferrari

Enrico Pirozzi

View More author details

Table of Contents (22) Chapters

Preface

1. Introduction to PostgreSQL

2. Getting to Know Your Cluster FREE CHAPTER

3. Managing Users and Connections

4. Basic Statements

5. Advanced Statements

6. Window Functions

7. Server-Side Programming

8. Triggers and Rules

9. Partitioning

10. Users, Roles, and Database Security

11. Transactions, MVCC, WALs, and Checkpoints

12. Extending the Database – the Extension Ecosystem

13. Query Tuning, Indexes, and Performance Optimization

14. Logging and Auditing

15. Backup and Restore

16. Configuration and Monitoring

17. Physical Replication

18. Logical Replication

19. Useful Tools and Extensions

20. Other Books You May Enjoy

21. Index

Auto-explain

Auto-explain is an extension that helps the DBA get an idea of slow queries and their execution plan. Essentially, auto-explain triggers when a running query is slower than a specified threshold, and then dumps the execution plan of the query in the PostgreSQL logs (refer to Chapter 14, Logging and Auditing, for more detail).

Note: the Docker image for this chapter comes with auto-explain and log machinery pre-configured.

In this way, the DBA can get an insight into slow queries and their execution plans without having to re-execute these queries. Thanks to this, the DBA can inspect the execution plans and decide if and where to apply indexes or perform a deeper analysis.

The auto-explain module is configured via a set of auto_explain parameter options that can be inserted in the PostgreSQL configuration (the postgresql.conf file), but you need to remember that in order to activate the module, you need to restart the cluster.

The auto-explain...

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Authors (2)

Luca Ferrari

Luca Ferrari

Luca Ferrari has been passionate about computer science since the Commodore 64 era, and today holds a master's degree (with honors) and a Ph.D. from the University of Modena and Reggio Emilia. He has written several research papers, technical articles, and book chapters. In 2011, he was named an Adjunct Professor by Nipissing University. An avid Unix user, he is a strong advocate of open source, and in his free time, he collaborates with a few projects. He met PostgreSQL back in release 7.3; he was a founder and former president of the Italian PostgreSQL Community (ITPUG). He also talks regularly at technical conferences and events and delivers professional training.

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Enrico Pirozzi

Enrico Pirozzi

Enrico Pirozzi, EnterpriseDB certified on implementation management and tuning, with a master's in computer science, has been a PostgreSQL DBA since 2003. Based in Italy, he has been providing database advice to clients in industries such as manufacturing and web development for 10 years. He has been training others on PostgreSQL since 2008. Dedicated to open source technology since early in his career, he is a cofounder of the PostgreSQL Italian mailing list, PostgreSQL-it, and of the PostgreSQL Italian community site, PSQL

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