Revisiting the Anatomy of HTTP Part1 and Part2 When dealing with web performance monitoring or optimization, it is important to learn the fundamentals of the HTTP protocol. The web as we know is built on top of this protocol, which has a large impact on performance of a webpage. Understanding how…
We are often asked what is the best metric to look at when monitoring web performance: average, percentiles, or standard deviation? It turns out that none of these are optimal, but that, depending on the type of measurement, either percentiles or standard deviations make good approximations. Response, or the time…
Counting discrepancies in impressions, page-views, and other visitor data impact every online tracking company, publisher, and marketer. The cost of such problems varies and it impacts directly everyone involved. The sooner the problem is found and solved, the better it is for all. Adservers, Ad Networks, Web Analytics, and Behavioral…
External monitoring tools draw a very powerful picture, that of your website performance, availability, and reliability – from the end user perspective. That said the picture can fall short at times in answering your main question – what happened and where? Things can get blurry! The main reason for the…
Today is another big milestone for Catchpoint, we are releasing in production support for Transaction Testing, across our Internet Explorer and Emulated monitoring agents. As a matter of fact we have major milestones every month. At Catchpoint we follow a very agile development process with weekly iterations and monthly releases to our…
Availability, or Uptime, is one of the most important metrics for web performance monitoring, however it is often misunderstood and defined incorrectly. Availability is simply the percentage of time your site, application, or service works successfully. The problems in defining Availability arise from defining what is considered “success” and what is…
The SLA (Service Level Agreement) topic is already well covered – books have been written and libraries filled on this subject- so I will try to avoid writing a book of my own. (BTW my favorite reference is: “Foundations of Service Level Management” by Rick Sturm and Wayne Morris )…
Today we are excited to announce the beta launch of Catchpoint Glimpse™, which will provide “real user monitoring”: Real user monitoring lets you track the performance of actual visitors to your websites or web applications. Catchpoint Glimpse provides multiple metrics to gauge user performance and pinpoint user problems. It is…
What’s the idea behind Catchpoint? Very Simple: make Monitoring Simple and Sexy! (Thank you Dynect for coming up with the MonitoringIsSexy concept! You are very Sexy Too 😉 !) We never thought that having a slow web response was in any way fun, either for the end-user, or for the…
In September 2008, after leaving DoubleClick/Google, we had a mission – but no company name. Thus, for the first year we were 3GenLabs – but then people kept asking us if we were a biotech company. Later, during the Friends & Family round it became clear something had to be…
