Add Some Entropy to Your JVM

Being able to generate true random numbers depends on the entropy in your system. Some claim, that this can be…

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How To Write Your Own Java / Scala Debugger

With this post we’ll explore how Java / Scala debuggers are written and work. Native debuggers such WinDbg for Windows…

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Java Mission Control 5.2 is Finally Here! Welcome 7u40!

It has been a while since we last heard of this fancy little thing called Mission Control. It came all…

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Dealing With Slow Resource Leaks

Finding resource leaks using Java-monitor Finding slow resource leaks is key to keeping your application servers up and running for…

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Understanding the OutOfMemoryError

Whenever you find yourself staring a stacktrace with OutOfMemoryError in it, it should all be crystal clear. The program has…

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5 Coding Hacks to Reduce GC Overhead

In this post we’ll look at five ways in which we can use efficient coding to help our garbage collector…

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Java Garbage Collection Distilled

Serial, Parallel, Concurrent, CMS, G1, Young Gen, New Gen, Old Gen, Perm Gen, Eden, Tenured, Survivor Spaces, Safepoints, and the…

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Java Just-In-Time compilation: more than just a buzzword

A recent Java production performance problem forced me to revisit and truly appreciate the Java VM Just-In-Time (JIT) compiler. Most…

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Garbage Collection in Java (4)

G1: Garbage First The G1 collector is the latest collector to be implemented in the hotspot JVM. Its been a…

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