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From: =?UTF-8?Q?Arne_Vajh=c3=b8j?= <arne@vajhoej.dk>
Newsgroups: comp.lang.java.programmer
Subject: Re: Restricting the memory usage of a Java program
Date: Thu, 11 Aug 2016 18:24:43 -0400
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On 8/11/2016 5:42 PM, Cecil Westerhof wrote:
> Bonus question: is there a way to limit the memory usage when the
> program is started with:
>     java CropImage
> instead of the script?

You can start JVM via JNI (really just your own java executable
replacement) with the Xmx you want.

But when the JVM is running then I don't know any way via
JMX or JNI to change the value.

Many JVM's require heap to be contiguous, so trying to
increase Xmx later may not be possible.

Arne