The Key to a Well-Running Web Site
October 25, 2016

Sven Hammar

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Website development and maintenance is not a simple proposition. You need to get your message out to your audience in a fast, attractive and secure way. Yet, making a website attractive and keeping it secure may take away some speed. Buy back speed by reducing security and you stand a chance of having your users avoid your site. Skimp on the aesthetics and your speed and security may not mean a thing, nobody's coming. What's a developer to do?

The answer, of course, is "test, test, test!” Test in development, test in the real world and, as you're fine-tuning and fixing, test each content exchange until the website is humming and your users are busy navigating your site, not complaining about it.

Using the correct monitoring tools is one key to bringing your website to the public quickly and keeping it working flawlessly with the least amount of pain to your users. So let's introduce some three-letter abbreviations here; The tools available are Web Performance Monitoring (WPM – aka Synthetic Monitoring), Application Performance Management (APM) and Real User Monitoring (RUM). Each of these has its use cases and when used together they combine to keep your website responsive and your users satisfied.


WPM uses synthetic monitoring, also known as active monitoring, which is monitoring using web browser emulation or scripted recordings of web transactions. You control testing the performance of the website as a whole, including how pages render, response time to content requests and other aspects of website operation that are directly responsible for how well or how poorly the website runs.

Use synthetic monitoring to test specific pages or transaction types that may not get regular traffic on your website, monitoring it from a user's perspective. Behavioral scripts simulate the actions or exercise paths that your users will take. An example of this would be to have the script login to the website, go through a transaction, get to the purchase page and then abandon the purchase. This gives you a clear indication of how a user will experience your checkout page and whether it takes too long to complete a purchase.

Use WPM, as well, to check javascript timing to see how long it takes your pages to render. Use synthetic monitoring on live websites from clients scattered throughout the world to test the network paths from where your users are connecting.


Use APM to allow your developers to dive deeper into website problems so root causes can be uncovered and fixes can be put in where they will do the most good. APM allows you to follow critical transactions through from start to finish so you can determine exactly what is going wrong on your website and perform searches for values to find where bugs, bottlenecks or less-than-optimal code can be found and fixed to create a faster, more efficient website.


Since RUM is a passive monitoring process, use it to provide information about how real-world users are experiencing your website. Find out whether slowdowns are tied to time-of-day, or specific content requests, or any of the variety of issues that can plague a normally smooth-running site. RUM won't tell you exactly what's wrong but it will alert you as things do go wrong and how your users are affected.

Unfortunately, RUM cannot be directed against specific pages or processes and cannot give you on-demand testing, nor can it be used to create an artificial load on your website to see how it reacts to stress. What it can do is alert you to those times when your website is starting to experience sub-optimal performance so you can get your team working on your issues.

Combine WPM, APM and RUM

The key to developing and maintaining a well-running website, then, is combining all three monitoring tools, using RUM to get a good sense of how your users are experiencing the website, WPM to exercise your code and get real baseline monitoring as well as testing of lesser-visited pages and using APM to troubleshoot and find the source of problems found by RUM and WPM. Only by using each of these tools can you ensure that your site is performance optimized.

Sven Hammar is Chief Strategy Officer and Founder of Apica
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