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Website monitoring is the process of testing and verifying that end-users can interact with a website or web application as expected. Website monitoring is often used by businesses to ensure website uptime, performance, and functionality is as expected. Website monitoring companies provide organizations the ability to consistently monitor a website, or server function, and observe how it responds. The monitoring is often conducted from several locations around the world to a specific website, or server, in order to detect issues related to general Internet latency, network hop issues, and to pinpoint errors. Monitoring companies generally report on these tests in a variety of reports, charts and graphs. When an error is detected monitoring services send out alerts via email, SMS, phone, SNMP trap, pager that may include diagnostic information, such as a network trace route, code capture of a web page's HTML file, a screen shot of a webpage, and even a video of a website failing. These diagnostics allow network administrators and webmasters to correct issues faster. Monitoring gathers extensive data on website performance, such as load times, server response times, page element performance that is often analyzed and used to further optimize website performance. ==Purpose of website monitoring== Monitoring is essential to ensure that a website is available to users, downtime is minimized, and performance can be optimized. Users that rely on a website, or an application, for work or pleasure will get frustrated or even stop using the application if it is not reliably available. Monitoring can cover many things that an application needs to function, like network connectivity, Domain Name System records, database connectivity, bandwidth, and computer resources like free RAM, CPU load, disk space, events, etc. Commonly measured metrics are response time and availability (or uptime), but consistency and reliability metrics are gaining popularity. Measuring a website's availability and reliability under various amounts of traffic is often referred to as load testing. Website monitoring also helps you benchmark your website against the performance of your competitors to help you determine how well your site is performing. Website speed is also used as a metric for search engine rankings. Website monitoring can be used to hold web hosting providers accountable to their service-level agreement. Most web hosts offer 99.9% uptime guarantee and, when uptime is less than that, individuals can be refunded for the excessive downtime. Note that not all hosts will refund individuals for excessive downtime so one must become familiar with the terms of service of their host. Most paid website monitoring services will also offer security features such as virus and malware scanning which is of growing importance as websites become more complicated and integral the business. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Website monitoring」の詳細全文を読む スポンサード リンク
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