Dismantling invokedynamic

Many Java developers regarded the JDK’s version seven release as somewhat a disappointment. On the surface, merely a few language…

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ChronicleMap – Java Architecture with Off Heap Memory

My last post was written a couple of weeks ago and after some valid feedback I’d like to clarify a…

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Using jstat to report custom JVM metric sets

I’ve always been missing possibility to configure custom headers in JStat. Of course there are a lot of predefined data…

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Minor GC vs Major GC vs Full GC

While working with the GC pause detection functionality in Plumbr I was forced to work my way through loads of…

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JVM Pressure – Context Switching Overhead

Context Switching (CS) is a valuable service provided by the underlying Operating System. It prevents greedy processes from CPU hogging,…

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Why is my JVM having access to less memory than specified via -Xmx?

“Hey, can you drop by and take a look at something weird”. This is how I started to look into…

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Byteman – a swiss army knife for byte code manipulation

I am working with a bunch of communities in JBoss and there is so much interesting stuff to talk about,…

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How JVMTI tagging can affect GC pauses

This post is analyzing why and how Plumbr Agents extended the length of GC pauses on certain occasions. Troubleshooting the underlying problem…

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Java Flight Recorder (JFR)

JFR is a Java profiler which will allow you to investigate the runtime characteristics of your code. Typically you will…

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