This chapter provides an overview of Oracle's Siebel Business Applications architecture and infrastructure and provides introductory information about tuning the Siebel applications for performance and scalability. It contains the following topics:

• About Performance and Scalability
• About Siebel Architecture and Infrastructure
• About Siebel User Request Flow
• Performance Tuning Terminology

Cross-references are provided to other chapters of this guide on how to configure specific areas of Siebel Business Applications. Optimally tuning these areas achieves a balance between performance and scalability.

For more information and details about the Siebel Business Applications architecture and infrastructure, see the following documentation on the Siebel Bookshelf:

• Siebel Deployment Planning Guide
• Siebel Installation Guide for the operating system you are using
• Siebel System Administration Guide
• Configuring Siebel Business Applications

NOTE:  Every implementation of Siebel Business Applications is unique. Your Siebel application architecture, infrastructure, and configurations may differ depending on your business model.