Apache is one of the most popular web servers of all time. A visit to Netcraft shows that Apache (with more than 54% of the total usage) is still the uncrowned king of web servers. Among a very long list of features, the best are extensibility and reliability. But on a low spec server running Apache 1.x, a large amount of traffic can quickly bring the server to its knees. For each new connection from a client, Apache creates a new process. Thus for a large number of connections, resource consumption is high. In worst cases, the resource consumption is so high it overloads the server and causes it to crash!! and so does your reputation as a Webhost! That is why it is important to be aware of alternatives and how they can sometimes even be used to support your existing web servers.