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)

Removing issues that cause bloat

Bloat can be caused by long running queries or long running write transactions that execute alongside write-heavy workloads. Resolving that is mostly down to understanding the workloads running on the server.

Getting ready

Look at the age of the oldest snapshots that are running, like this:

postgres=# SELECT now() -
WHEN backend_xid IS NOT NULL
THEN xact_start
ELSE query_start END
AS age
, pid
, backend_xid AS xid
, backend_xmin AS xmin
, state
FROM pg_stat_activity
WHERE backend_type = 'client backend'
age | pid | xid | xmin | state
00:00:25.791098 | 27624 | ...