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Tag Archives: Memory

Escaping the JVM heap for memory intensive applications

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If you’ve ever allocated large Java heaps, you know that at some point – typically starting at around 4 GiB – you will start having issues with your garbage collection pauses. I won’t go into detail about why pauses happen in the JVM, but in short it happens when the JVM does full collections and you have a large heap. ...

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Memory Access Patterns Are Important

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In high-performance computing it is often said that the cost of a cache-miss is the largest performance penalty for an algorithm. For many years the increase in speed of our processors has greatly outstripped latency gains to main-memory. Bandwidth to main-memory has greatly increased via wider, and multi-channel, buses however the latency has not significantly reduced. To hide this latency ...

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OutOfMemoryError: Java heap space – Analysis and resolution approach

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 java.lang.OutOfMemoryError: Java heap problem is one of the most complex problems you can face when supporting or developing complex Java EE applications. This short article will provide you with a description of this JVM HotSpot OutOfMemoryError error message and how you should attack this problem until its resolution. For a quick help guide on how to determine which type of ...

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What every Programmer should know about the memory system

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Traditionally, RAM, or Random Access Memory, was used to describe a memory which offered the same access latency for all its memory locations.  This is barely the case with modern DRAM systems. In this post, I describe a ten thousand foot view of how modern DRAMs work with the hope that it can help the programmers in choosing their algorithms ...

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