Yes, what we call a tiered display, which looks like a layer
cake with each layer showing the proportion of time spent in
on part of the script activity, is a very valuable way to gain
a lot of intuition about how a web application performs.
There are several widely used systems that allow this kind of
display, including Nagios, Groundwork, Zenoss and Hyperic. In
most cases the display is produced using some variant of the
RRD (Round Robin Database) appliance.
There probably are many other network status reporting engines
that do the same kind of graphing.
Here is live demo of eValid Application Performance Monitoring
done by our eValid partner in Belgium, Super-Visions:
http://www.e-Valid.com/Products/Documentation.9/Monitoring/SuperVisions/peace.of.mind.demo.htmlFor this demo you can use Account = "demo" and Password =
"demo".
Hope this helps.