Webhostpython.com is now offering the NginX webserver as a proxy in front of Apache with all reseller and shared hosting plans.
NGINX is a high performance web application accelerator that helps over 37% of the world’s busiest websites deliver more content, faster, to its users. NGINX manages the complexities and pitfalls associated with HTTP and makes our customers web applications more responsive, scalable, fast and secure.
Nginx is better for high-traffic sites due to its event-driven architecture. Rather than handling each request in a distinct thread, it uses non-blocking I/O to service many requests in each thread.
The important aspect of this architecture is the reduced use of processes or threads. A thread can consume anywhere from 2MB to over 64MB of RAM. So when Apache serves a 10KB JPEG, it may actually be using a significant amount of RAM. It becomes worse if you have slow clients (e.g. smartphones) where the request may keep a thread busy for several seconds.
Having Nginx as a proxy in front of Apache is an ideal middle ground. Nginx talks to the slow clients and can do so using a very small amount of RAM. When requests are forwarded to Apache, the request speed is limited by your local connectivity, not that of the remote user. This means that the network bottleneck will not keep the request (and its memory-hogging thread) alive for any longer than necessary.
In short you get the low-resource benefits of Nginx coupled with the wide feature-set of Apache.