dynaTrace just posted a really nice tutorial showing how to track client-side performance (JavaScript, DOM, render times, etc) automatically using Selenium. They do this by using their super-cool free AJAX edition of their product.

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dynaTrace · Selenium

A couple weeks ago, New Relic launched a new hosted, on-demand Java profiling tool. We’re big fans of New Relic (great for Ruby or Java), dynaTrace (great for .NET or Java), and other application performance monitoring tools because they complement our website load testing and website monitoring services so well.

At BrowserMob, we’re a Java shop, and so it didn’t take long for us to have an opportunity to try out New Relic’s Java profiler. We were getting reports from some customers that viewing the response time charts of their monitoring data was occasionally slow (don’t worry, we didn’t miss the irony.)

To investigate the problem, we turned on New Relic’s profiler and selected 5 minutes of profiler time. You can choose between 1 and 10 minutes as the length of time you want to gather data. During that time, there is a small but potentially noticeable hit in performance on your site, but the upside is that the profiler is able to inspect deep in to our codebase and expose bottlenecks.

Five minutes later, we instantly saw the problem:

As you can see, during that 5 minute period, 55% of the time was spent on java.net.SocketInputStream.socketRead. Tracing back a bit, we were able to see that was from a call by MonitoringController.selectRangeForObject. It turned out we were calling a cloud-based data server that was having performance issues due to the way we constructed our API call. It didn’t take more than a few minutes to optimize the call and roll out the fix.

Such is the power of application performance monitoring tools. If you’re doing any sort of load testing, website monitoring, or page optimizations, you’re going to be very blind unless you have access to information like this. That’s why we jumped at the opportunity to partner with New Relic and dynaTrace and encourage all our customers to look at their products.

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.NET · dynaTrace · Java · Load Testing · Monitoring · New Relic · Profiler · Untitled