JVM is down with “OutOfMemory” error – what should I do?

Amazing as it may seem, but this particular cry “From the Depths” is frequently displayed among the results of search…

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Starting multiple JBoss A-MQ JVMs on the same machine

So I haven’t been blogging as much recently — just been really busy. But my New Year’s resolution is to…

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How is Java / JVM built ? Adopt OpenJDK is your answer!

Introduction & history As some of you may already know, starting with Java 7, OpenJDK is the Reference Implementation (RI)…

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Testing JVM server-side JavaScript with Jasmine, Spock and Nashorn

JavaScript usage is not limited to client-side code in browser or NodeJS powered server-side code. Many JVM based projects are…

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cjmx: A command-line version of JConsole

JConsole is a nice tool when it comes to monitoring a running Java application. But when it is not possible…

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Own your heap: Iterate class instances with JVMTI

Today I want to talk about a different Java that most of us don’t see and use every day, to…

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On heap vs off heap memory usage

Overview I was recently asked about the benefits and wisdom of using off heap memory in Java. The answers may be…

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Self-healing JVM

This post is an example about an application where the first solution to each and every IT problem – “have…

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Java performance tuning survey results (part IV)

This is the last post in series where we analyze the results of the Java Performance Tuning Survey we conducted…

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