IBM HTTP Server Powered by Apache does not support the mod_status module. APM uses the mod_status module to collect and report metrics. Consequently, any webserver which does not support mod_status is not supported by APM.
The mod_status module is used to deliver server-status statistics which APM uses for monitoring.
This simple Apache module allows a Web administrator to capture at a point in time various Apache Web server and access performance-related statistics by drilling down to the work performed by each individual thread.
The iSeries HTTP Server (powered by Apache) does not support mod_status.
Additional information available in the APM PowerPack for Webservers documentation:
Monitoring web servers
Q. For monitoring and getting performance metrics of a new web server based on standard base types of Sun ONE, Apache and Microsoft IIS, is there any requirement?
A. Yes. For Apache based web server the mod_status module must be available. Sun ONE servers must have service-dump function and WMI classes must be available on IIS web server machine.