I'm building out a small webserver farm (IIS7.5) to serve up an internal website. One of the things I want to measure is what the HTTP response time is between user requests and the page being served.
Given that I'm using HAProxy as a front-end load balancer, it would seem natural that HAProxy would be in an ideal place to collect this information, as it sits between every request/response. However, looking at the generated stats page, there's a lot of good information but I can't see anything about response times.
What would be the best way to go about doing this? Is this a function that HAProxy can do, or would I need some other specialist monitoring software?