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On RPi 3B/Raspbian, I'm experiencing dreadful seize-ups when it appears I've filled the memory up with programs. Mouse movements, for example, can take 10 seconds.

This happens with a standard setup.

Is there a way to set the system to mitigate against this, by, for example, warning the user this may be about to occur, so reconsider starting that additional app/opening that additional data-heavy browser tab?

Any elucidation on the mechanics of this situation would be most helpful.

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    Read up on the linux OOM killer. There are various ways to constrain app resource usage, it depends on context. I'm not aware of any warning apps separate from watching a resource monitor, but it would be pretty easy to implement one. – goldilocks Sep 13 '20 at 16:23
  • I suggest removing swap. That way the OOM killer will just kill some memory hogger instead of the system freezing up because the SD card (swapping in general) is just so much slower than real ram. – Goswin von Brederlow Sep 27 '20 at 16:32
  • Thanks for the responses. I did try removing swap, though I do still run into seizures as such. Often, I can overcome this by for example pressing Ctrl-F4 when in the browser then go away for a while (make a cup of tea say). It usually gets me unstuck but it can still take a while (5 mins maybe). I can't tell if removing the swap has helped, as my behaviour is now such that I'm careful not to load too many resource-heavy pages at once. – TKonan Mar 13 at 16:26
  • I guess I'm surprised that the system (Raspbian) doesn't anticipate resource exhaustion, and/or reserve resources to ensure it can operate/provide a warning when resources run low. In saying that, am I misunderstanding the underlying Raspbian/Linux strictures that make this impossible? Wouldn't others often run into this problem? I don't see others with the same complaint. Maybe something else has got into my system so its not as standard as I imagined. – TKonan Mar 13 at 16:35

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