The 'PostgreSQL 12 High Availability Cookbook' is a comprehensive guide to setting up and maintaining highly available PostgreSQL clusters. This book provides practical recipes for designing a resilient database system that can handle outages and recover quickly without downtime. What this Book will help me do Learn how to configure replication tools to protect PostgreSQL data effectively. Understand and implement hardware strategies for ensuring optimal database performance. Master the techniques for reducing contention with connections using pooling strategies. Gain insights into using monitoring tools like Nagios and Grafana for PostgreSQL cluster management. Develop a robust strategy for version upgrades, backups, and failover. Author(s) Shaun Thomas is a seasoned database specialist with extensive experience managing PostgreSQL systems. As a PostgreSQL contributor and advocate, he brings a depth of practical knowledge to database reliability and automation. Shaun's engaging and clear writing style ensures that readers can apply the discussed techniques with confidence. Who is it for? This book is ideal for database administrators, IT professionals, and developers who maintain PostgreSQL systems and want to improve uptime or reliability. Familiarity with basic PostgreSQL concepts is recommended, but no specific knowledge of version 12 features is required. Readers aiming to build advanced high availability solutions will find this book invaluable. It's perfect for those aspiring to ensure their database systems are both resilient and adaptive.