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)

Killing a specific session

Sometimes, the only way to let the system continue as a whole is by surgically terminating some offending database sessions. Yes, you read it right: surgically. You might indeed be tempted to reboot the server, but you should think of that as a last resort in a business continuity scenario.

In this recipe, you will learn how to intervene, from gracefully canceling a query to brutally killing the actual process from the command line.

How to do it...

You can either run this function as a superuser or with the same user as that of the offending backend (look for the usename field in the pg_stat_activity view).

Once you have figured out the backend you need to kill, use the function named pg_terminate_backend...