This manual is volume 3 of the official reference documentation for PostgreSQL 8.2.4. This volume is the system administration guide, and covers the installation, configuration and maintenance of PostgreSQL database servers. Topics covered include backups, security, tuning and upgrade procedures, as well as routine tasks such as creating and deleting databases. Later chapters provide a detailed explanation of advanced PostgreSQL features, including file-based and record-based log-shipping, continuous archiving and point-in-time recovery. This book is part of a series including volume 1, the "SQL Language Reference" (ISBN 0954612027), and volume 2, the "Programming Guide" (ISBN 0954612035). For each copy of this manual sold $1 will be donated to the PostgreSQL project by the publisher.