There is no application server

We have recently posted data about application server market share we gathered from the free Plumbr deployments. And it resonated…

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Hunting down memory leaks: a case study

A week ago I was asked to fix a problematic webapp suffering from memory leaks. How hard can it be,…

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Common pitfalls in benchmarking

Every once in awhile each and every one of us is trying to measure performance of certain parts of the…

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How expensive is a method call in Java

We have all been there. Looking at the poorly designed code while listening to the author’s explanations about how one…

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How to shoot yourself in foot with ThreadLocals

It will start nicely. Like most of the stories. You discover a new concept and are amazed by it’s powers.…

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How many threads do I need?

It depends on your application. But for those who wish to have some insight about how to squeeze out most…

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Why can’t I turn off the Garbage Collector?

Let’s start with a quick rewind to the early days of my career as a Java developer. I wanted to…

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Making the right decisions when optimizing code

You have an optimization task at hand. Which is great – you finally have the possibility to do something interesting…

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Should you trust the default settings in JVM?

JVMs are considered smart nowadays. Not much configuration is expected – just set the maximum heap to use in the…

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