List/Grid Tag Archives: JVM

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We Are Failing to Even Have an Inclusive Discussion

The tech industry needs to be more inclusive of woman and people of color. It’s about having the largest pool to draw excellence from. Sadly, most of the discussion, even the discussion that is advocating for a more inclusiv ...
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Java Debugger – The Definitive List of Tools

Java debugging is a complex space. There are many types of debuggers, and numerous tools to choose from. In this page, we’ll cover the differences between 7 types of debuggers, and review the major tools in each category to help ...
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(Part 1 of 3): Synopsis of articles & videos on Performance tuning, JVM, GC in Java, Mechanical Sympathy, et al

I have been contemplating for a number of months about reviewing a cache of articles and videos on topics like Performance tuning, JVM, GC in Java, Mechanical Sympathy, etc… and finally took the time to do it – may be ...
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G1 vs CMS vs Parallel GC

This post is following up the experiment we ran exactly a year ago comparing the performance of different GC algorithms in real-life settings. We took the same experiment, expanded the tests to contain the G1 garbage collector and ...
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Investigating Memory Leaks Part 1 – Writing Leaky Code

I found this little problem the other day: there’s this server that runs for a while and then falls over. It’s then restarted by its startup script and the whole process repeats itself. This doesn’t sound that bad as it ...
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Crashing your JVM

Thorough testing can be harmful as we discovered recently. Extending our test coverage led us to a several-hours debugging session caused by just one line of code. What made the debugging particularly unpleasant was the fact that ...
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Java VM – Beware of the YoungGen space

As you may have seen from our previous performance oriented articles, a healthy JVM is one of the most important goals to achieve for optimal application performance and stability. Such health assessment is very often only focusin ...
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What Garbage Collector are you using?

Our research labs are humming at full speed. With the recent injection of capital, we can only warrant that the pace at which we keep innovating will only increase. Part of the research we conduct is related to GC optimizations. W ...
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Java final fields on x86 a no-op?

I have always enjoyed digging in to the details of multi-threaded programming, and always enjoy that despite reading for years about CPU memory consistency models, wait-free and lock-free algorithms, the java memory model, java co ...
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Running out of memory without the OutOfMemoryError

This is actually a reincarnation of a post originally posted in ~2010. The flashback occurred when listening to our engineers cursing at a particularly nasty bug raising its head yesterday. When the cursing stopped, I stepped by t ...
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