Usually the primary reason for having a monitoring system when running popular web sites or services is the simple need to notify the responsible persons about any critical situations like for example lost network connectivity, broken databases or even flawed applications. But there's a lot more to it: having enough data is crucial for any administrator and developer to be able to easily identify and to quickly react to problematic, real-world issues like repeating load patterns or other, hard-to-spot performance bottlenecks. This half-day training session will show you how to setup and effectively use Zenoss, an open source monitoring and IT management solution, to keep an eye on the health and performance of your infrastructure. Several hands-on lessons and in-depth discussions of the following topics will give you a firm understanding of Zenoss and its rich feature-set: setup and basic usage, availability monitoring, performance monitoring and graphing of device and host properties (filesystem and CPU usage, memory consumption, interface throughput etc.) as well as application-specific properties, advanced SNMP usage, report generation, inventory and event management as well as specialized plugins and other customizations. We will also recap and build on the examples shown in the tutorial session and work on graphing additional properties like e.g. JVM statistics or database connections. To make your Zenoss ride as smooth as possible we will end with walking through some general maintenance tasks and discussing several common pitfalls you might encounter.