This document provides instructions for installing and configuring ArcSight ESM 5.5. It discusses planning the installation, including sizing the database and identifying hardware requirements. It then covers installing the ArcSight database software, creating a new Oracle database instance, and initializing the ESM schemas and resources. The document also discusses partition management, which is used to archive old event data. Installation of other ESM components like the ArcSight Manager and SmartConnectors is not covered.