Book Image

PostgreSQL High Performance Cookbook

By : Chitij Chauhan, Dinesh Kumar
Book Image

PostgreSQL High Performance Cookbook

By: Chitij Chauhan, Dinesh Kumar

Overview of this book

PostgreSQL is one of the most powerful and easy to use database management systems. It has strong support from the community and is being actively developed with a new release every year. PostgreSQL supports the most advanced features included in SQL standards. It also provides NoSQL capabilities and very rich data types and extensions. All of this makes PostgreSQL a very attractive solution in software systems. If you run a database, you want it to perform well and you want to be able to secure it. As the world’s most advanced open source database, PostgreSQL has unique built-in ways to achieve these goals. This book will show you a multitude of ways to enhance your database’s performance and give you insights into measuring and optimizing a PostgreSQL database to achieve better performance. This book is your one-stop guide to elevate your PostgreSQL knowledge to the next level. First, you’ll get familiarized with essential developer/administrator concepts such as load balancing, connection pooling, and distributing connections to multiple nodes. Next, you will explore memory optimization techniques before exploring the security controls offered by PostgreSQL. Then, you will move on to the essential database/server monitoring and replication strategies with PostgreSQL. Finally, you will learn about query processing algorithms.
Table of Contents (19 chapters)
PostgreSQL High Performance Cookbook
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Customer Feedback
Preface

CPU scheduling parameters


In this topic, let's discuss a few CPU scheduling parameters, which will fine tune the scheduling policy.

Getting ready

In the previous recipe, we discussed memory-related parameters, which are not sufficient for better performance. Much like memory, kernel also supports various CPU-related tuning parameters, which will drive the processes scheduling.

How to do it...

Let us discuss about, few major CPU kernel scheduling parameters in Linux:

kernel.sched_autogroup_enabled

This parameter groups all the processes that belong to the same kernel session ID, which are further processed as a single process scheduling entity rather than multiple entities. That is, the CPU will indirectly spend a contiguous amount of time on a group of processes that belong to the same session rather than switching to multiple processes. Using the ps xa -o, sid, pid, and comm command, where we can get the session ID of the processes. It is always recommended to set this value to 0 for the PostgreSQL...