Dante,

I'm pretty sure that MaxPermSize is actually *part* of the heap size - it's 
just a cap on the permanent generation space in the heap (as the name suggests).

Regardless, for CF on Windows (assuming the box has more than 2gb of ram), I 
would keep Xmx=1024m and -XX:MaxPermSize=192m. Anything above that and I've 
found the 1.4.2 JVM to get unstable.

Dave Ross
http://www.coldspringframework.org
  
>How large can the sum of the maximum heap size (-Xmx) and the maximum
>permanent generation size (-XX:MaxPermSize) be for a JRun/CF process
>on Windows? I'm aware of the 2GB limit for jvm processes on Windows,
>but I would have thought that I could set max heap and max perm to any
>combination as long as it was no bigger than 2GB (2048MB). Instead,
>what I am finding is that CF will not start when (max heap + max perm)
>is larger than 1.6GB, or 1640MB, to be precise.
>
>-dante

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