Update of bug #20988 (project mypaint):
Status: Need Info => None
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Follow-up Comment #7:
Okay, thanks for all the info. It looks like you simply have a big image with
many layers that actually needs more RAM than you have to work with. Nothing
seems to have gone awfully wrong.
MyPaint doesn't support larger-than-RAM images at the moment. We could
probably try to give the user an early warning, since the problem often
happens in the worst moment. But it's tricky to guess how much RAM we are
allowed to use. We could also try to optimize RAM usage in several ways, but I
don't think there are any low-hanging fruits.
What you can do as a workaround is to swap some RAM to disk, as I have
suggested before. Use 'free' on the commandline to check if you already have
swap. I think rule of thumb is to create a swap file at most 2x your RAM size.
You can also try to combine layers and then save, quit MyPaint and reopen, to
continue working.
Maybe this needs a FAQ/wikipage or something.
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