Understanding max JVM heap size

Posted by Marcus on Stack Overflow See other posts from Stack Overflow or by Marcus
Published on 2010-03-16T19:40:09Z Indexed on 2010/03/16 19:41 UTC
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java

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jvm

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memory

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heap

I've read the max heap size on 32bit Windows is ~1.5GB which is due to the fact that the JVM requires contiguous memory. Can someone explain the concept of "contiguous memory" and why you only have max 1.5GB on Windows?

Secondly, what then is the max heap size on 64 bit Windows and why is this different than what's available on 32 bit?

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