List/Grid Tag Archives: JVM

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sun.misc.Unsafe and off heap memory

The class sun.misc.Unsafe allows you to many of the things you shouldn’t be able to do in Java, but are still useful in very specific cases. It is to be avoided 99% of the time, ...
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How to estimate memory consumption?

This story goes back at least a decade, when I was first approached by a PHB with a question “How big servers are we going to need to buy for our production deployment”. The new ...
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GC impact on throughput and latency

One type of the problems each and every Java application out there has to wrestle with is related to garbage collection. When the garbage collector works, it represents a wonderful ...
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Post-hoc tracing using a debugger

Once nice little features of most debuggers that I have been exercising recently is the ability to log information on a breakpoint. This can be a really useful was to understand code ...
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Java vs. Native Agents – The Powerful Things They Do

What you should know before installing an agent, and how it affects your code When building a scalable server-side application we spend considerable amount of time thinking about how ...
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Mirror Mirror – Using Reflection To Look Inside The JVM at Run-time

Developers: Takipi tells you when new code breaks in production –  Learn more We’re all used to employing reflection in our everyday work, either directly, or through frameworks ...
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Memory leaks and memory management in Java applications

One of the more prominent features of the Java platform is its automatic memory management. Many people translate this feature erroneously into there are no memory leaks in Java. However, ...
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(Part 2 of 3): Synopsis of articles & videos on Performance tuning, JVM, GC in Java, Mechanical Sympathy, et al

This is a continuation of the previous post titled (Part 1 of 3): Synopsis of articles & videos on Performance tuning, JVM, GC in Java, Mechanical Sympathy, et al. Without any ...
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RMI enforcing Full GC to run hourly

During all the troubleshooting exercises I have carried out in my career, I have picked up a feeling that the bugs I am after are evolving and becoming meaner and uglier over time. ...
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Anatomy of a Java Decompiler

A decompiler, simply put, attempts to reverse the transformation of source code to object code. But there are many interesting complexities—Java source code is structured; bytecode ...
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