App crash when loading big files in Ubuntu 20.10

[Nothor]

Hi you all,

I use Sweet home 3D since years ago, always in Ubuntu, but in the last version 20.10 and with Sweet home 6.4.2 (with Java3D 1.5.2) I have noticed a problem loading "big" files, or more than big, with a lot of different objects.

Sweet home 3D crashes and resets the whole Gnome Desktop.

After investigating a lot I realized, this doesn't happen if I open Sweethome as Root (with sudo). [:-/]

At the end the problem was with the amount of RAM memory available for java in Ubuntu.

In order to check the amount of RAM reserved execute

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java -XshowSettings:vm

The ouput will start with something like this:

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	VM settings:
		Max. Heap Size (Estimated): 1.67G
		Ergonomics Machine Class: server
		Using VM: OpenJDK 64-Bit Server VM

Where the "Heap Size" is the memory.

In my system I have 8GB of RAM so I have increased to 4GB in order to be sure it will not crash at start.

In order to do that, simply add this env variable "_JAVA_OPTIONS" with the amount of RAM available, before execute Sweethome

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_JAVA_OPTIONS=-Xmx4096m ./SweetHome3D-Java3D-1_5_2

And that's it.

I hope it helps other like me [:)]