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Increasing heap size – beware of the Cobra Effect

The term ‘Cobra effect’ stems from an anecdote set at the time of British rule of colonial India. The British government was concerned about the number of venomous cobra snakes. ...
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Do you get Just-in-time compilation?

Remember the last time when you were laughed at by C-developers? That the Java is so slooooow that they would never even consider using a language like this? In many ways, the concept ...
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Who is stealing your memory? The Application Servers Edition

You create an amazing app. You put it into production. And you notice that you justdo not have enough memory available. Even when all your measurements (maybe taken with the help of ...
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Busting PermGen Myths

In my latest post I explained the reasons that can cause the java.lang.OutOfMemoryError: PermGen space crashes. Now it is time to talk about possible solutions to the problem. Or, ...
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What is a PermGen leak?

What follows is a practical introduction to a specific type of memory problems in Java applications. Namely – we will analyze the errors that cause the java.lang.OutOfMemoryError: ...
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How much memory do I need

What is retained heap? How much memory will I need? This is a question you might have asked yourself (or others) when building a solution, creating a data structure or choosing an algorithm. ...
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How many Java developers are there in the world?

Oracle says it’s 9,000,000. Wikipedia claims it’s 10,000,000. And the guys from NumberOf.net seem to be the most precise – they know that there are exactly 9,007,346 Java developers ...
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