List/Grid Tag Archives: JVM

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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… ...
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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 ...
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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 ...
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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 ...
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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. ...
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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 ...
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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 ...
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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. ...
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Add Some Entropy to Your JVM

Being able to generate true random numbers depends on the entropy in your system. Some claim, that this can be guaranteed by fair dice roll. Others think that replacing the OpenJDK’s ...
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How To Write Your Own Java / Scala Debugger

With this post we’ll explore how Java / Scala debuggers are written and work. Native debuggers such WinDbg for Windows or gdb for Linux/Unix get their power from hooks provided to ...
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