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This is a weird problem. On one of our demo machines running Windows 7, we are trying to increase the amount of memory allocated to the heap. I open the Java control panel. Click on the Java tab and the click the View button. I type -Xmx256m in the Runtime Parameters fields. Then click OK. So far so good. However, if I navigate away from the tab and then navigate back, the parameters that I just typed disappear. Any ideas?
I’m not sure if this can be done from JRE control panel but you can create environment variable with name ‘_JAVA_OPTS’ and set any java parameters there (-Xmx256m). This will be picked up by any java process started on that computer.