In the Cloud, you have to trust your instruments...

Michael Kopp

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Top Stories by Michael Kopp

In the past few weeks I visited several Cloud and Big Data conferences that provided me with a lot of insight. Some people only consider the technology side of Big Data technologies like Hadoop or Cassandra. The real driver however is a different one. Business analysts have discovered Big Data technologies as a way to leverage tons of existing data and ask questions about customer behavior and all sorts relationships to drive business strategy. By doing that they are pushing their IT departments to run ever bigger Hadoop environments and ever faster real-time systems. What's interesting from a technical side is that ad-hoc analytics on existing data is allowed to take some time. However ad-hoc implies people waiting for an answer, meaning we are talking about minutes and not hours. Another interesting insight is that Hadoop environments are never static or standalo... (more)

How Garbage Collection Differs in the Three Big JVMs

(Note: If you’re interested in WebSphere in a production environment, check out Michael's upcoming webinar with The Bon-Ton Stores) Most articles about Garbage Collection ignore the fact that the Sun Hotspot JVM is not the only game in town. In fact whenever you have to work with either IBM WebSphere or Oracle WebLogic you will run on a different runtime. While the concept of Garbage Collection is the same, the implementation is not and neither are the default settings or how to tune it. This often leads to unexpected problems when running the first load tests or in the worst case... (more)

Troubleshooting Response Time Problems

Production Monitoring is about ensuring the stability and health of our system, that also includes the application. A lot of times we encounter production systems that concentrate on System Monitoring, under the assumption that a stable system leads to stable and healthy applications. So let’s see what System Monitoring can tell us about our Application. Let’s take a very simple two-tier Web Application: A simple two tier web application This is a simple multi-tier eCommerce solution. Users are concerned about bad performance when they do a search. Let's see what we can find out a... (more)

Application Performance Monitoring in Production

Setting up Application Performance Monitoring is a big task, but like everything else it can be broken down into simple steps. You have to know what you want to achieve and subsequently where to start. So let’s start at the beginning and take a top-down approach Know What You Want The first thing to do is to be clear of what we want when monitoring the application. Let’s face it: we “do not want to” ensure CPU utilization to be below 90 percent or a network latency of under one millisecond. We are also not really interested in garbage collection activity or whether the database ... (more)

Cloud Computing: Cloud Expo in NYC is Coming!

Another year and another Cloud Expo in New York. This year I will be giving two different presentations. The first is on Application Performance Monitoring in the Clouds. In this talk I will cover the five top lessons we have learned about performance and cloud applications. The second is about Performance Management in ‘Big Data' Applications. Most articles that I found on performance and Big Data are about the performance options on the Big Data product itself, but tend to be pretty light on the application itself. In this talk I will cover the two sides of BigData (Hadoop Ma... (more)