List/Grid Tag Archives: JVM

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5 tips for proper Java Heap size

Determination of proper Java Heap size for a production system is not a straightforward exercise. In my Java EE enterprise experience, I have seen multiple performance problem cases ...
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How to analyze Thread Dump – Thread Stack Trace

This article is part 5 of our Thread Dump analysis series. So far you have learned the basic principles of Threads and their interactions with your Java EE container & JVM. You ...
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JRockit – JRCMD useful commands

I have been using JRockit since many years 2007. I find it slower than Hotspot, but it has been always better on diagnosis and analysis of problems. Since last summer, I have been working ...
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Tracking excessive garbage collection in Hotspot JVM

Quite frequently due to memory leaks or other memory problems applications freeze leaving only the garbage collector (GC) process running unsuccessfully trying to free some space. ...
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Just in Time Compiler (JIT) in Hotspot

The Just In Time Compiler (JIT) concept and more generally adaptive optimization is well known concept in many languages besides Java (.Net, Lua, JRuby). In order to explain what is ...
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How to analyze Thread Dump – IBM VM

This article is part 4 of our Thread Dump analysis series which will provide you with an overview of what is a JVM Thread Dump for the IBM VM and the different Threads and data points ...
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OutOfMemoryError: Java heap space – Analysis and resolution approach

 java.lang.OutOfMemoryError: Java heap problem is one of the most complex problems you can face when supporting or developing complex Java EE applications.This short article ...
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GC overhead limit exceeded – Java Heap analysis

This post is the continuation of our original GC overhead limit exceeded problem patterns post. Proper Java Heap analysis is critical in order to eliminate your OutOfMemoryError: GC ...
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Java High CPU troubleshooting guide – part 1

This article is part 1 of a series that will provide you with a comprehensive guide on how you can troubleshoot and identify root cause of Java high CPU problems. This guide is also ...
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HPROF – Memory leak analysis tutorial

This article will provide you with a tutorial on how you can analyze a JVM memory leak problem by generating and analyzing a Sun HotSpot JVM HPROF Heap Dump file. A real life case ...
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