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Performance is a Journey not a Destination!
  • Anatomy of an HTTP Transaction Posted on September 17th, 2010 by Catchpoint Systems

    Please check also the new version:  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 […]

  • What is best metric in Web Performance Monitoring? Average, Percentiles, or Standard Deviation? Posted on September 2nd, 2010 by Catchpoint Systems

      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 it takes to load an […]

  • How Online Tracking Companies Failed to Properly Track IE7 Viewers in the Last 4 Years. Posted on August 24th, 2010 by Catchpoint Systems

    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 Targeting companies – all have […]

  • Performance Picture not Sharp Enough? Posted on August 17th, 2010 by Catchpoint Systems

    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 shortcoming is that from the […]

  • Agile Rocks! Release day. Posted on August 16th, 2010 by Catchpoint Systems

    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 end users.  The tool we […]

  • True Availability of a Webpage Posted on July 21st, 2010 by Catchpoint Systems

    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 considered “failure”. In the case an […]

  • Monitoring the Performance of 3rd Party Providers (CDNs, Ad Servers, Widgets…). Posted on July 20th, 2010 by Catchpoint Systems

    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 ) In my experience SLAs are […]

  • Another Big Release. Posted on July 12th, 2010 by Catchpoint Systems

    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 easy to correlate data collected […]

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