AS we all know, no big surprize ;-) But in this case it limited the joys of the RasPi somewhat.
I had a Monitorix instance running on my node, and most likely due tu wrong configuration from my side, it boosted the LOAD on the RasPi. More then that, it used so much I/O that Friendica relevant processes like MariaDB or the background process of Friendica got problems. Problems that lifted the LOAD ahead of Moons orbit around Earth.
I turned it off the other weekend and the LOAD dropped to something below or around 1. From 3.5 before.
So eventhough I enjoyed the graphs and liked the ability to just look at the state of the small one. I am now happier without them. But, as I said above, most likely I had just the intervalls set wrong in Monitorix!