> What I don't understand is why modern Linux is so shy of touching swap. With old kernels, Linux happily pushed unused pages to a swap, so even if you don't ea

> What I don't understand is why modern Linux is so shy of touching swap. With old kernels, Linux happily pushed unused pages to a swap, so even if you don't eat memory, your swap will be filled with tens or hundreds MB of memory and that's a great thing. Modern kernel just keeps swap usage at 0, until memory is exhausted. The article has the answer.