Book Image

PostgreSQL 10 Administration Cookbook - Fourth Edition

By : Simon Riggs, Gianni Ciolli
Book Image

PostgreSQL 10 Administration Cookbook - Fourth Edition

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 10 allows users to scale up their PostgreSQL infrastructure. This book takes a step-by-step, recipe-based approach to effective PostgreSQL administration. Throughout this book, you will be introduced to these new features such as logical replication, native table partitioning, additional query parallelism, and much more. You will learn how to tackle a variety of problems that are basically the pain points for any database administrator - from creating tables to managing views, from improving performance to securing your database. More importantly, the book pays special attention to topics such as monitoring roles, backup, and recovery of your PostgreSQL 10 database, ensuring high availability, concurrency, and replication. By the end of this book, you will know everything you need to know to be the go-to PostgreSQL expert in your organization.
Table of Contents (14 chapters)

Maintaining indexes

Indexes can become a problem in many database applications that involve a high proportion of INSERT/DELETE commands. Just as tables can become bloated, so can indexes.

In the previous recipe, you saw that non-HOT updates can cause bloated indexes.
Non-primary-key indexes are also prone to some bloat from normal INSERT commands, as is common in most relational databases.

Autovacuum does not detect bloated indexes, nor does it do anything to rebuild indexes. So we need to look at other ways to maintain indexes.

Getting ready

PostgreSQL supports commands that will rebuild indexes for you. The client utility, reindexdb, allows you to execute the REINDEX command in a convenient way from the operating system...