While at NDC in Oslo, Carl and Richard talked to Nik Molnar and Anthony van der Hoorn about instrumenting web application. Of course the conversation starts out with a catch-up on Glimpse, the awesome session-based instrumentation tool for your web pages. Then the conversation moves to looking at instrumentation end-to-end on web applications, in the aggregate, so that you can see where your pain points are and where to focus your attention on tuning. Nik talks about starting at the high level view point so that you focus on the right things - it's not always about the code!