Book Image

Learn PostgreSQL

By : Luca Ferrari, Enrico Pirozzi
Book Image

Learn PostgreSQL

By: Luca Ferrari, Enrico Pirozzi

Overview of this book

PostgreSQL is one of the fastest-growing open source object-relational database management systems (DBMS) in the world. As well as being easy to use, it’s scalable and highly efficient. In this book, you’ll explore PostgreSQL 12 and 13 and learn how to build database solutions using it. Complete with hands-on tutorials, this guide will teach you how to achieve the right database design required for a reliable environment. You'll learn how to install and configure a PostgreSQL server and even manage users and connections. The book then progresses to key concepts of relational databases, before taking you through the Data Definition Language (DDL) and commonly used DDL commands. To build on your skills, you’ll understand how to interact with the live cluster, create database objects, and use tools to connect to the live cluster. You’ll then get to grips with creating tables, building indexes, and designing your database schema. Later, you'll explore the Data Manipulation Language (DML) and server-side programming capabilities of PostgreSQL using PL/pgSQL, before learning how to monitor, test, and troubleshoot your database application to ensure high-performance and reliability. By the end of this book, you'll be well-versed with the Postgres database and be able to set up your own PostgreSQL instance and use it to build robust solutions.
Table of Contents (27 chapters)
1
Section 1: Getting Started
5
Section 2: Interacting with the Database
12
Section 3: Administering the Cluster
20
Section 4: Replication
23
Section 5: The PostegreSQL Ecosystem

Extracting information from logs – PgBadger

Thanks to the rich set of information that can be included in the logs, it is possible to automate log information analysis and extraction. There are several tools with this aim, and one of the most popular is PgBadger.

PgBadger is a self-contained Perl 5 application that carefully reads and extracts information from PostgreSQL logs, producing a web dashboard with a summary of all the information it has found in the logs. The aim of this application is to provide you with a more useful insight into the logs without having to manually search for specific information with low-level tools such as grep, awk, and text editors.

Using PgBadger is not mandatory; your cluster will work fine without it and you will be able to seek information and problems in the logs anyway. However, using PgBadger deeply simplifies log management and provides you with more useful hints about what your server has done.

It is important to note that using PgBadger...