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

Monitoring disk space


In this recipe, we are going to show the commands that are used to monitor disk space.

How to do it...

We can use the df command with various switches to monitor disk space. To make the output more understandable, we often use the -h switch with the df command as follows:

bash-3.2$ df -h 
 
Filesystem                                           size   used  avail capacity  Mounted on 
                                                    132G    80G    50G    62%     / 
/devices                                             0K     0K     0K      0%     /devices 
ctfs                                                 0K     0K     0K      0%    /system/contract 
proc                                                 0K     0K     0K     0%     /proc 
mnttab                                               0K     0K     0K     0%     /etc/mnttab 
swap                                                418G   488K   418G     1%    /etc/svc/volatile...