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Blogs by Dennis Callaghan
  • gartner-guide
    Web Monitoring Just Isn’t Good Enough Anymore Posted on March 9th, 2017 by Dennis Callaghan

    Monitoring tools for websites have been around for more than two decades now. They can tell you whether your site is up or down, how long it takes your webpage to load, even how long it takes to complete a multi-step transaction. All of this is done by monitoring the communication layers of the web, […]

  • synthetic-monitoring
    5 Reasons Synthetic Monitoring is More Important than Ever Posted on December 15th, 2016 by Dennis Callaghan

    This post originally appeared as a bylined article in Website Magazine. Synthetic monitoring is hardly a new technology. It’s been around almost as long as the commercial World Wide Web has. But the importance of monitoring the performance and availability of a web application by simulating users’ interactions with that application, from around the globe, […]

  • ddos
    Managing DNS Performance Has Never Been More Critical Posted on December 9th, 2016 by Dennis Callaghan

    October’s massive distributed denial of service on Dyn DNS proved once again the importance and yet, the vulnerability of DNS. Dyn’s managed DNS services were hit in three separate waves from morning to evening, taking down major websites like Netflix, Twitter, Spotify, Reddit, and SoundCloud in the process. DDoS attacks on managed DNS services are […]

  • it-complexity
    Got IT Complexity? Monitor the User Experience Posted on October 14th, 2016 by Dennis Callaghan

    It’s no secret that IT operations has changed a lot over the last decade or so. New technologies like cloud, virtualization, containers, and microservices have made applications and infrastructure more distributed, more efficient, and more flexible at the expense of predictability and manageability. This is why technologies like Catchpoint’s have come to the forefront in […]

  • velocity
    Velocity NYC Report: Is the Mobile Web Ready for a Comeback? Posted on September 28th, 2016 by Dennis Callaghan

    Last week’s Velocity New York conference by O’Reilly Media was held on the heels of new research published from DoubleClick by Google that concluded that mobile page load times of more than three seconds result in a 53% site abandonment rate. That’s not much margin for error for the devices that now account for 65% […]

  • design for web performance across devices
    Designing for Optimum Web Performance Across Devices Posted on August 15th, 2016 by Dennis Callaghan

    Back in the Internet’s good old days, website design was relatively easy. Sure there were different browsers and operating systems to account for, but virtually all users accessed your site from desktop or laptop computers. Today’s web design game is a bit more challenging, thanks to the proliferation of smartphones and tablets. Mobile device usage […]

  • Keeping up with Amazon
    Can Other Retailers Keep Up with Amazon? Posted on July 21st, 2016 by Dennis Callaghan

    The second Amazon Prime Day came and went earlier this month with at least eight other major retailers joining in with their own online sales and promotions. When it comes to online retail, Amazon, whose total sales were nearly a third of the entire US retail e-commerce market last year, is a pace-setter that other […]

  • gartner itoss
    Connecting the Dots at Gartner ITOSS Posted on May 31st, 2016 by Dennis Callaghan

    Earlier this month, I had the chance to spend a couple of days at the Gartner IT Operations, Strategies & Solutions conference in National Harbor, Md. The conference was a mix of pep talks, how-to sessions, roadmap ideas and networking opportunities for IT operations professionals. We heard a lot of the usual encouragement for IT […]

  • retail omnichannel
    In Retail, It’s an Omnichannel World Posted on May 13th, 2016 by Dennis Callaghan

    Online retail has been a game-changer over the last two decades but it’s still a relatively small percentage of total retail spend, less than 6% according to the US Census Bureau’s Annual Retail Trade Survey. While brick-and-mortar retailers long ago established online channels, powerhouse online retailers like Amazon are moving into physical stores. And just […]

  • Gartner Blog Banner
    Is Your APM Strategy Broken: Closing the EUM Gap Posted on May 9th, 2016 by Dennis Callaghan

    As the modern application landscape has exploded alongside the Internet over the last two decades, so have the tools to monitor and manage the performance and availability of those applications. But all of the advancements in application, server, database, and network monitoring don’t mean that much without visibility into what the end user is actually […]

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