Answer Posted / pravin b

Hi,
The limit of heap size distribution depends on the
combination of 32-bit JVM and 32 / 64-bit OS and also
depends on windows os and unix/linux os.

For windows OS , heap size would be less as compared to
solaris & linux

As per the Oracle-sun documentation
32-bit Jvm and 32-bit OS :-> max 2gb heap size
32-bit JVM and 64-bit OS :-> max 4gb heap size

for
64-bit JVM and 64-bit OS :-> beyond 4gb heap size

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