Browsing posts tagged with: monitoring technology

Why Test NetFlow with Tcpreplay 4.0
February 13, 2014 by

Networking Technology, Performance Monitoring

In my blog “NetFlow Performance Testing with Tcpreplay 4.0” I introduced new IP Flow / NetFlow features that I recently added to Tcpreplay, with the claim that this is the best solution for testing Layer 7 flow collectors. Today we discover how Layer 7 collectors differ from traditional flow collectors, and why they need to be tested
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AWS re:Invent 2013: Werner Vogels Gets It
November 27, 2013 by

Industry Insights, Performance Monitoring

I consider myself fortunate to have now attended the first two AWS re:Invent Conferences. 2012 was notable for its impact as the first event, and 2013 did not disappoint with big crowds and lots of energy —  the show had it all! I attended many great sessions with some true thought leaders in the SaaS
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Beyond Averages
November 20, 2013 by

Performance Monitoring

What’s the best way to debug web systems performance problems?  It starts simply: look at how the application is functioning.  But if the system is at scale, with massive concurrency, how do we wrap our heads around all that performance data? Traditionally we aggregate our data into summary statistics like averages or percentiles.  These are
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How Loading Time Affects Your Bottom Line (from Kissmetrics)
September 24, 2013 by

Industry Insights

The fine folks over at KissMetrics put together a stunning infographic on just how important this performance stuff is. It’s easy to get caught up in shipping features and polishing UX, but sometimes, the low-hanging fruit is the first performance step, not the 50th A/B test. Check it out below (click for a larger version)
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A Gentle X-Trace Introduction
September 23, 2013 by

Performance Monitoring

In the world of SaaS applications, good monitoring can be the difference between a successful product and a failure. There’s a lot of ink spilled on what to do with your monitoring data, but somewhat less of what that data actually is. Etsy’s Measure Everything is a great place to start. Capture points of interest
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An Introduction to Client Latency
August 23, 2013 by

Performance Monitoring

What is client latency? Let’s face it, users are impatient. They demand a blazingly fast experience and accept no substitutes. Google performed a study in 2010 which proved that when a site responds slowly, visitors spend less time there. Speed as perceived by the end user is driven by multiple factors, including how fast results
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AppNeta offers modern performance monitoring for cloud.

A Painless Introduction to Java’s ThreadLocal Storage
July 22, 2013 by

Performance Monitoring

What is ThreadLocal? A simple example As its name suggests, a single instance of ThreadLocal can store different values for each thread independently. Therefore, the value stored in a ThreadLocal instance is specific (local) to the current running Thread, any other code logic running on the same thread will see the same value, but not
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AppNeta offers modern performance monitoring for cloud.

Tracing Black Boxes I: JMX Insight Into JVM Performance
March 11, 2013 by

Performance Monitoring

As an APM sales engineer at AppNeta, I’m constantly exposed to new technologies, and over the past few months I’ve gained a lot of insight into some fairly obscure parts of the Java web ecosystem. Where else would I have the opportunity to learn about Cocoon, Felix, or Railo? I’m primarily a Python developer, though – even some well-known features of Java
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AppNeta offers modern performance monitoring for cloud.

The Taming of the Queue: Measuring the Impact of Request Queueing
February 21, 2013 by

Performance Monitoring

Last week, webserver request queueing came under heightened scrutiny as rapgenius blasted Heroku for not using as much autotune as promised in their “intelligent load balancing”. If you somehow missed the write-up (or response), check it out for its great simulations of load balancing strategies on Heroku. What if you’re not running on Heroku? Well, the same wisdom still
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Why Deploying Cisco’s IP SLA Isn’t a Performance Management Strategy
February 19, 2013 by

Performance Monitoring

IP SLA is a network monitoring capability deployed by Cisco-powered enterprises to measure several network health metrics between locations, but it’s far from a complete network performance monitoring tool. One of our financial service industry customers recently shared how they used PathView Cloud to pinpoint an unexpected WAN provider issue that was missed by IP
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