Plugin is in development, not fully ready yet.
There’s also the plugin “pause games” that can suspend a game, stopping it from having any CPU/GPU load while you play something else. However it doesn’t free up used memory, and sometimes controls don’t work when multiple games are open, with one game intercepting inputs meant for the other games. So this would be pretty cool if it works out.
I wonder how far pausing the process(es) can take us already, yes it does not free the RAM but Linux can simply move it into swap on it’s own. Maybe similiar thing works for GPU memory?
Yeah, part of the early recommendation for using the pause games plugin was to increase your swap size to 16GB or more, to make room for running multiple games like this. Most everyone just sticks to the default ZRAM now, and even if you increase the emergency swap I don’t think the system will use it until the ZRAM is maxed capacity.