CompressedOops: Introduction to compressed references in Java

In this article we are going to introduce you to one of the JVM optimizations known as Compressed oops. The idea…

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Elastic infrastructure in practice

A couple of weeks ago I got a rare opportunity to get my hands dirty in the infrastructure field. Being…

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HotSpot Incremental Java Garbage Collector

In my recent blog post Determining the Active HotSpot Garbage Collector, I described different approaches that can be used to…

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Determining the Active HotSpot Garbage Collector

The StackOverflow questions find which type of garbage collector is running, Default Garbage collector for a jvm, How can I…

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Looking at DiagnosticCommandMBean in JConsole and VisualVM

I’ve used JConsole for many years as a suitable generic JMX client. This tool is generally available with the Oracle…

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Printing arrays by hacking the JVM

Overview One the most common gotchas in Java, is knowing how to print arrays. If an answer on how to…

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Default HotSpot Maximum Direct Memory Size

In my previous blog post Improved Documentation of HotSpot Options in Java 8, I wrote about the misunderstandings surrounding the…

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Decrease your Java IDE lagging by fine tuning JVM Garbage Collector

Ever wondered why Eclipse/Netbeans keeps pausing for a while every now an then? Especially right at the time when you…

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Simplicity and Value of HotSpot’s -XshowSettings Flag

A handy HotSpot JVM flag (option for the Java launcher java) is the -XshowSettings option. This option is described in…

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