Configure heap size without -Xmx

Is it possible to configure java to always start with 512M head size without use the -Xmx option. In other words, can I change the default heap size from 64M to 512M or do I have to always start my java with -Xmx512M?

[224 byte] By [smassemana] at [2007-11-26 20:34:31]

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# 1

Hi,

Are you really asking whether you can change the maximum heap size, programmatically, from within the JVM? If you do, the answer is that you cannot do that. The JVM needs to pre-allocate a few memory spaces (generations, card table, etc.) while it's starting up and, once it's up and running and starts executing bytecodes, at least some of those memory spaces cannot be resized.

Tony, HS GC Group

TonyPrintezisa at 2007-7-10 1:26:18 >

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# 2

is it possible with a script or any thing else, I want to launch a jar file with at least 256mo and the script must be multi OS... too hard for me :(

alfadura at 2007-7-10 1:26:18 >

# 3

Hey,What OSes are you targeting? The script should be the same for all the Unixes and maybe you'll have to write a bat file for windows, which is really not that hard.Tony, HS GC Group

TonyPrintezisa at 2007-7-10 1:26:18 >

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Configure heap size without -Xmx

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