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Learning PostgreSQL 10 - Second Edition

You're reading from Learning PostgreSQL 10 - Second Edition

Product type Book

Published in Dec 2017

Publisher

ISBN-13 9781788392013

Pages 488 pages

Edition 2nd Edition

Languages

Concepts

Database Programming

Table of Contents (23) Chapters

Title Page

Credits

About the Authors

About the Reviewers

www.PacktPub.com

Customer Feedback

Preface

1. Relational Databases

2. PostgreSQL in Action

3. PostgreSQL Basic Building Blocks

4. PostgreSQL Advanced Building Blocks

5. SQL Language

6. Advanced Query Writing

7. Server-Side Programming with PL/pgSQL

8. OLAP and Data Warehousing

9. Beyond Conventional Data Types

10. Transactions and Concurrency Control

11. PostgreSQL Security

12. The PostgreSQL Catalog

13. Optimizing Database Performance

14. Testing

15. Using PostgreSQL in Python Applications

16. Scalability

Summary

In the chapter, we discussed the problem of building scalable solutions based on PostgreSQL utilizing resources of several servers. There is a natural limitation for such systems--basically, there is always a compromise between performance, reliability, and consistency. It is possible to improve one aspect but others will suffer.

PostgreSQL providers several ways to implement replication that would maintain a copy of the data from a database on another server or servers. This can be used as a backup or a standby solution that would take over in case the main server crashes. Replication can also be used to improve, performance of a software system by making it possible to distribute load on several database servers.

In some cases, the functionality of replication provided by PostgreSQL can be not enough. There are third-party solutions that work around a PostgreSQL providing extra features, such as PgBouncer working as a connection pool or Pgpool-II, which can work as a load balancer...

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