Comment 2 for bug 729787

How much resolution do you need in order to get useful server stats? Is this for generating graphs, adding info for debugging individual requests, or something else?

If it needs to be per-request, could it be limited to only the requests which generate errors? Could it be calculated after sending a response to the client?

If it's just for periodic data, how about using a simple proc/sys logging daemon? They're pretty easy to write, and wouldn't interfere with server response times.