Any way to increase the default Heap size for all Java VMs in Solaris 8

Hello,
I have a java product that deals with large databases under Solaris 8. It is a jar file, started by a cron job every night. Some nights it will fail because it runs out of Heap memory depending on the amount of records it has to deal with. I know that I could increase the java VM heap size with "java -jar -mx YY JARFILE" command but I have other java products that are showing the same behavior, and I would like to correct them all in one shot if possible.
What I would like to do is find a system or configuration parameter that forces all Java VMs to use a larger MAX Heap size than the default 16M specified in the Man page for Java. Is there a way to accomplish that?
TIA
Maizo

You could always download the source and modify it.

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