Memory empty cause need to reboot

Guys, my node give-me for time to time a full memmory and i have to reboot some time badly. (power off).
I have 8Gb and only 8 apps installed.
The currente memmory alocated is very dificult to understand.
See screenshots and give-me some solutions i have to do.
It is very confuse
This is after reboot

Captura de ecrã 2023-01-31 182539