This document discusses adding Apache web servers to an existing unified monitoring toolkit using AppDynamics. It provides an overview of Apache server monitoring capabilities in AppDynamics, including automatically discovering and mapping Apache servers, starting business transactions at the web server tier, and capturing key performance indicators and error metrics. It also reviews supported Apache versions and operating systems, the installation and setup process, features like business transactions, snapshots, and correlation across tiers. The document demonstrates how to monitor a 503 service unavailable error end-to-end and concludes with an invitation to AppDynamics' annual user conference.