Book Image

Mastering PostgreSQL 10

Book Image

Mastering PostgreSQL 10

Overview of this book

PostgreSQL is an open source database used for handling large datasets (big data) and as a JSON document database. This book highlights the newly introduced features in PostgreSQL 10, and shows you how you can build better PostgreSQL applications, and administer your PostgreSQL database more efficiently. We begin by explaining advanced database design concepts in PostgreSQL 10, along with indexing and query optimization. You will also see how to work with event triggers and perform concurrent transactions and table partitioning, along with exploring SQL and server tuning. We will walk you through implementing advanced administrative tasks such as server maintenance and monitoring, replication, recovery, high availability, and much more. You will understand common and not-so-common troubleshooting problems and how you can overcome them. By the end of this book, you will have an expert-level command of advanced database functionalities and will be able to implement advanced administrative tasks with PostgreSQL 10.
Table of Contents (15 chapters)

Handling global data

In the previous sections, you have learned about pg_dump and pg_restore, which are two vital programs when it comes to creating backups. The thing is, pg_dump creates database dumps—it works on the database level. If you want to back up an entire instance, you have to use pg_dumpall or dump all the databases separately. Before we dig into that, it makes sense to see how pg_dumpall works:

pg_dumpall > /tmp/all.sql  

pg_dumpall will connect to one database after the other and send stuff to standard out, where you can process it with Unix. pg_dumpall can be used just like pg_dump. However, it has some downsides. It does not support a custom or directory format and therefore does not offer multicore support-you will be stuck with one thread.

However, there is more to pg_dumpall. Keep in mind that users live on the instance level. If you create a normal...