On 06/07/2020 23:27, deloptes wrote: > May be look deeper in documentation - I recall asking few years ago and was > answered that now it would cache whatever it can and will free on demand. > swap is done only if memory is really insufficient. > > I don't recall when or where I asked read this >
I probably wouldn't understand much delving deeper into the documentation or even code^^ Using up all the available RAM for disk cache and freeing cache when memory is needed is what Linux did for as long as I can remember and still does. Swapping being only done when there is no memory available is exactly what the "swappiness" parameter did when set to "1" in Stretch, but this doesn't seem to work in Buster anymore as it swaps out the diskcache even when there is memory available.