FPS performance - VRAM bug?

I have had some better flights but today again 55GB RAM usage and VRAM usage 15GB, over the actual amount of memory available to the sim.
Texture res is set to medium, and this is while being at cruise level FL290. There should be no ground scenery textures etc loaded.
This must be bad memory management, things are not being unloaded.
This still happens in the SU1 Beta.

A new record. During landing i had 20GB VRAM usage (i have 16), 60GB RAM (i have 64):

Back in the main menu it remains high after i let it stabilize: