Unexpected drops in uptime can indicate unplanned outages or restarts of the server. Uptime is usually measured in seconds, since the server was started.This metric indicates the amount of information that is transferred with each request.This metric can be used as an indicator of server performance, relative to constraints such as network infrastructure. This metric measures the amount of information being transferred in and out of the server.
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Additionally, significant changes in this number can point to other problems, such as a failure of infrastructure between the server and its clients, shown by a drastic drop, or a surge in requests, which might point to an attempt at a denial of service (DOS) attack. Used in combination with other metrics, it can be used to determine how the server performs under different loads. This metric is specifically used to measure the server performance.Let’s look at specific metrics and thresholds we’ll want to monitor directly from the Apache installation, and the underlying infrastructure. Additionally, we also want to monitor trends to identify cases where that experience might be trending towards an undesirable state. In observing and actively monitoring each of these areas, we want to ensure that we collect relevant and timely metrics and analyze them, so as to ensure a smooth and efficient user experience. Any errors and exceptions are appropriately handled.Appropriate response codes are generated.As administrators, or operations staff supporting a web server, we should be concerned with the following aspects of the server related to that purpose. Content can take the form of static web pages, dynamic web pages, or other media. The purpose of a web server is to accept requests from clients and respond with appropriate content. We’ll finish by building a custom dashboard and discuss additional steps you should consider. With an understanding of what we should be monitoring, we’ll look at integrating Apache and Librato to surface those metrics in a meaningful way.
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In this article, we’re going to look at the importance of monitoring, and identify the key metrics and indicators that should be included in a monitoring plan. 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. 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. 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. Having recently celebrated its 20th birthday in 2015, Apache has a long and impressive record of dominating the web server space on the Internet. Learn more about monitoring Apache performance using AppOptics. Note: This article was originally published on Librato, which has since been merged with SolarWinds ® AppOptics ™.