Surges of high RAM usage

With 8GB RAM and a minimum of apps for node management I get these periodic surges of RAM usage that make my node sluggish and unstable:

What is the solution? Less channels? More RAM? A different node management platform?

Another Saturday morning RAM surgeScreenshot 2023-01-28 at 09.44.22

Here we go again. These must be attacks of some kind.Screenshot 2023-03-11 at 11.19.47