Book Image

PostgreSQL 14 Administration Cookbook

By : Simon Riggs, Gianni Ciolli
5 (1)
Book Image

PostgreSQL 14 Administration Cookbook

5 (1)
By: Simon Riggs, Gianni Ciolli

Overview of this book

PostgreSQL is a powerful, open-source database management system with an enviable reputation for high performance and stability. With many new features in its arsenal, PostgreSQL 14 allows you to scale up your PostgreSQL infrastructure. With this book, you'll take a step-by-step, recipe-based approach to effective PostgreSQL administration. This book will get you up and running with all the latest features of PostgreSQL 14 while helping you explore the entire database ecosystem. You’ll learn how to tackle a variety of problems and pain points you may face as a database administrator such as creating tables, managing views, improving performance, and securing your database. As you make progress, the book will draw attention to important topics such as monitoring roles, validating backups, regular maintenance, and recovery of your PostgreSQL 14 database. This will help you understand roles, ensuring high availability, concurrency, and replication. Along with updated recipes, this book touches upon important areas like using generated columns, TOAST compression, PostgreSQL on the cloud, and much more. By the end of this PostgreSQL book, you’ll have gained the knowledge you need to manage your PostgreSQL 14 database efficiently, both in the cloud and on-premise.
Table of Contents (14 chapters)

Investigating a psql error

Error messages can sometimes be cryptic, and you may be left wondering, why did this error happen at all?

For this purpose, psql recognizes two variables – VERBOSITY and CONTEXT; valid values are tersedefault, or verbose for the former and nevererrors, or always for the latter. A more verbose error message will hopefully specify extra details, and the context information will be included. Here is an example to show the difference:

postgres=# \set VERBOSITY terse
postgres=# \set CONTEXT never
postgres=# select * from missingtable;
ERROR:  relation "missingtable" does not exist at character 15

This is quite a simple error, so we don't need the extra details, but it is nevertheless useful for illustrating the extra detail you get when raising verbosity and enabling context information:

postgres=# \set VERBOSITY verbose