Trying to evaluate the requirements of my Web application, I wanted to put it under load and at the same time check how it scales on memory and CPU.

But running AB/HTTPerf and htop/"pidstat -C" in a way that produces a coherent log file is quite challenging. Further, those monitoring tools consume a lot of CPU resources, injecting a bias in the results.

The best match for the task I could find is an open-source wrapper for ApacheBench:

http://dsec.com/source/ab.c.txt

Do you know about other open-source tools that do it all in one single step?

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possible duplicate of Tools for load-testing HTTP servers? – mailq Sep 29 '11 at 20:53
I too want to see such a tool (and may yet create it). In the past I’ve recorded dstat output in a csv file, then stitched it together in a spreadsheet with httperf data. That’s way too time consuming though. – Michael Kropat Dec 16 '11 at 23:00
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