Micro jitter, busy waiting and binding CPUs

Performance profiling a new machine When I work on a new machine, I like to get an understanding of it’s…

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Printing Generated Assembly Code From The Hotspot JIT Compiler

Sometimes when profiling a Java application it is necessary to understand the assembly code generated by the Hotspot JIT compiler.…

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Garbage Collection in Java (3)

This follows on from my previous two garbage collection blog posts: Overview of GC in Hotspot. Parallel Garbage Collectors. Concurrent…

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Garbage Collection in Java (2)

Parallel Scavenge Today we cover how Parallel GC works. Specifically this is the combination of running a Parallel Scavenge collector…

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Garbage Collection in Java (1)

This is the first in a series of posts about Garbage Collection (GC). I hope to be able to cover…

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Why does my Java process consume more memory than Xmx?

Some of you have been there. You have added -Xmx option to your startup scripts and sat back relaxed knowing…

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GC Memory Visualizer Tutorial – Part1

As you may have read from past articles, one of the key Java programmer skills to acquire is your ability…

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Reducing memory consumption by 20x

This is going to be another story sharing our recent experience with memory-related problems. The case is extracted from a…

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JVM Performance Magic Tricks

HotSpot, the JVM we all know and love, is the brain in which our Java and Scala juices flow. Over…

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