This manual is part of the official reference documentation for PostgreSQL 9.0. 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. The other volumes of this series are Volume 1A "The SQL Language" (ISBN 978-1-906966-04-1), Volume 1B, the "SQL Command Reference" (ISBN 978-1-906966-05-8), and Volume 2, the "Programming Guide" (ISBN 978-1-906966-06-5). For each copy of this manual sold 1 USD is donated to the PostgreSQL project by the publisher, Network Theory Ltd.