Yep that’s the setting I rather randomly changed :)
I also use zram/zswap for swap and even used tmpfs for /tmp (though ran into problems due to temporary files building up when doing plate solving). This all on a 4gb PI. I don’t think I’ve run out of ram and only ever had minimal swap usage so kstars/ekos isn’t exactly eating all the memory. That said I’ve only gotten things all working recently so have only taken around a hundred images in a session.

I used to have more problems when I used to take larger resolution images (with the same camera ) but stopped using the fits viewer all the time, switched off the notification sounds, changed to aps-c resolution and applied lots of updates which seems to have ‘cured’ that.No idea what it was though as it was quite random :)

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