Yes, it is sort of miraculous! And it may serve you well, as long as you’re careful with it. Many cyclists do not favour using it with bikes because it is not a very good long lasting lubricant and will interfere with better lubricants. Some are nervous about it particularly around greased bearings such as a bottom bracket, where it might get in there and compromise seals and good grease. That being said, it is a pretty great product for cleaning and short term lubing stuff in my opinion. Just got to be careful and aware of limitations. However, not sure it’s worth the size of a can for touring. Might depend on a bunch of factors such as type and location and duration of tour. As much as I personally like the stuff it would not be high on my priority list. But you do you! Have fun, however you decide.

I used to use earlyoom on an old laptop and it worked well for my purposes.

I hear there is a systemd-oomd, but I never tried it.

Edit: sorry I misread your post to be about memory rather than CPU. Too early on the morning for my brain to work.