Ahhh interesting, that did the trick. Thank you so much.

I have been also trying to understand the internals of nginx caching and how it works. I read the nginx blog about the overall architecture and the nginx man page about proxy_cache_* directives. I am looking for the internal architecture of the how the caching subsystem works. If you guys have any documentation or article about it, that would be so useful.

- Karthik