Why doesn't the "system monitor" widget display the load status the way it does?

Question

linux

In fact, less than 50% of RAM is full, but in the widget, the middle column is almost full. Why does it display like this?

Answer 1

recompiled

Answer 2

It turns out that on the widget panel, the status of absolute RAM fullness (including cached) is displayed, and in the pop-up window and the system monitor - the actual occupied RAM.