* Web requests should be typically processed in no more than 500ms, and
ideally under 200ms.
* Even though an error page will be issued to the client, and the
connection terminated, when a timeout occurs the web process is still
left to process the request. Subsequent requests may then be routed to
the same process which will be unable to respond, causing further
* rack-timeout ensures processes don’t remain tied up after 5 seconds of