Book Image

PostgreSQL 9 High Availability Cookbook

By : Shaun Thomas
Book Image

PostgreSQL 9 High Availability Cookbook

By: Shaun Thomas

Overview of this book

A comprehensive series of dependable recipes to design, build, and implement a PostgreSQL server architecture free of common pitfalls that can operate for years to come. Each chapter is packed with instructions and examples to simplify even highly complex database operations. If you are a PostgreSQL DBA working on Linux systems who want a database that never gives up, this book is for you. If you've ever experienced a database outage, restored from a backup, spent hours trying to repair a malfunctioning cluster, or simply want to guarantee system stability, this book is definitely for you.
Table of Contents (12 chapters)
11
Index

Connecting to PgBouncer

Once PgBouncer is installed, configured, and operational, we still need to utilize it. How do we connect to PgBouncer instead of PostgreSQL?

Getting ready

Make sure PgBouncer is configured and running. Take a look at the Configuring PgBouncer safely recipe. Then, execute this at the command line to check for the service:

pgrep -lf pgbouncer

We should see a line similar to this:

21281 /usr/bin/pgbouncer -d /etc/pgbouncer/pgbouncer.ini

If this is not the case, we need help beyond the scope of this book. Feel free to check the PgBouncer mailing list for assistance. The community is willing to help too, so let them.

How to do it...

If our PostgreSQL server is on 192.168.56.30, we can connect to PgBouncer by using port 6432. With psql, we can connect to the postgres database through PgBouncer with this command:

psql -p 6432 -h 192.168.56.30 postgres

With PgAdmin, we will just change the connection settings to resemble this:

How to do it...

How it works...

PgBouncer works like a simulated PostgreSQL...