The Apache::VMonitor module provides even better monitoring functionality than top. It supplies all the relevant information that top does, plus all the Apache-specific information provided by Apache's mod_status module (request processing time, last request's URI, number of requests served by each child, etc.) In addition, Apache::VMonitor emulates the reporting functions of the top, mount, and df utilities.
Apache::VMonitor has a special mode for mod_perl processes. It also has visual alerting capabilities and a configurable "automatic refresh" mode. A web interface can be used to show or hide all sections dynamically.
The module provides two main viewing modes:
Multi-processes and overall system status
Single-process extensive reporting