Hello.

Consider the following situation: you are deploying application that can serve 1 req./sec. What would happen if I send 10 request in 1 second? I wrote simple app to test that: https://github.com/amezhenin/nginx_slow_upstream .
This test shows that your requests will be served _in_exact_same_order_ they were sent.

For now, this looks like Nginx have some kind of queue for requests, but my colleague(administrator) sayd that there is no any queues in Nginx. So I wrote another question about epoll here: http://stackoverflow.com/questions/19114001/does-epoll-preserve-the-order-in-which-fds-was-registered . From that discussion I figured that epoll does preserves the order of requests.

I have two questions:
1) Is there any mistakes in reasoning/code above?
2) Does Nginx have some sort of queue for requests on top of epoll? Or Nginx uses pure epoll functionality?

Thank you, and sorry for my English :)