app request

There are several apps such as "Smart Memory Booster" which will do what you want, by adding selected apps to a "whitelist."

My guess is that this will make your device more sluggish.

 

Maybe I'm wrong and this app will do what you want. It's worth a try. I think that it will probably be able to "defend" a few of your apps from getting killed, but you will pay a price with system responsiveness.

Make sure that you understand the difference between RAM and internal storage. You probably do ...

There are lots of articles describing android's RAM usage strategy, "process lifecycle" etc.

 

It terminates those things because you are running something that needs more RAM tham available. If you try to stop Android from killing those while another app is demanding RAM, your device will lag and possibly freeze.