Having recently celebrated its 20th birthday in 2015, Apache has a long and impressive record of dominating the web server space on the Internet. In a survey conducted in July of 2016 by Netcraft, Apache was reported to be the most popular server with 46.4% of market share. (https://news.netcraft.com/archives/2016/07/19/july-2016-web-server-survey.html) If you're reading this article, I suspect you're an Apache user, and that you're well acquainted with its stable nature, and modular architecture allowing it to be configured to meet a multitude of needs. As stable as Apache is, it is nevertheless important that users implement a robust monitoring system to ensure that the web server functions efficiently, and that potential problems are identified before they lead to fatal events.