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Reducing the frequency of major GC pauses

This post will discuss a technique to reduce the burden garbage collection pauses put on the latency of your application. As I have written couple of years ago, disabling garbage collection ...
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Garbage Collection: increasing the throughput

The inspiration for this post came after stumbling upon “Pig in the Python” definition in the memory management glossary. Apparently, this term is used to explain the situation ...
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Memory leaks – measuring frequency and severity

This post is part of our open culture – we continue sharing insights from our day-to-day work. This time we take a peek at the very core of our value proposition, namely – looking ...
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Understanding volatile via example

We have spent last couple of months stabilizing the lock detection functionality in Plumbr. During this we have stumbled into many tricky concurrency issues. Many of the issues are ...
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Identifying JVM – trickier than expected

In Plumbr we have spent the last month by building the foundation for future major improvements. One of such building blocks was addition of the unique identifier for JVM in order to ...
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Out of memory: Kill process or sacrifice child

It is 6 AM. I am awake summarizing the sequence of events leading to my way-too-early wake up call. As those stories start, my phone alarm went off. Sleepy and grumpy me checked the ...
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Debugging to understand Finalizers

This post is covering one of the Java built-in concepts called Finalizer. This concept is actually both well-hidden and well-known, depending whether you have bothered to take a look ...
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Building a nirvana

What started out three years ago as in a form of a single ANT file has grown into literally a hundred of build tasks taking more than eight hours to complete from start to finish on ...
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Migrating from javaagent to JVMTI: our experience

When you need to gather data from within the JVM, you will find yourself working dangerously close to the Java Virtual Machine internals. Luckily, there are ways you can avoid getting ...
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Allocating memory for the JVM: a case study

This post is about a recent performance tuning exercise. As always, these start with vague statements about symptoms. This time the devil took the form of “The application is slow ...
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