How to measure/profile "Datastore Reads/Writes" from a single request?

The "new pricing model" has resources "Datastore Reads" and "Datastore Writes". But I could not find detailed information on exactly how this is measured.

Hard to opti开发者_如何学运维mize datastore utilization if I can not profile it! Any clues on how to do that? http://code.google.com/appengine/articles/managing-resources.html doesnt give any details...

Have you trying AppStats, it can help you: http://code.google.com/appengine/docs/python/tools/appstats.html

With this software you can profiling all API call.