This document discusses database configuration guidelines for optimizing Siebel CRM application performance from a database perspective. It identifies key factors that influence performance such as operating system settings, hardware configuration, database server configuration, and queries from other applications. It provides recommendations for configuring database parameters, gathering statistics, Siebel session parameters, and analyzing query plans. It also describes two examples where performance tuning improved extract times from 3 days to 12 hours and synchronization times from failing to 10-12 minutes.