PMDG 777 + Global/Vector + Payware airport VAS issues

Hey,

I am trying to figure out on how the VAS jumps like 600-700MB when nearing a default airport in P3D 2.5 (hotfix applied).  I have building autogen set to normal, vegetation to Dense.  Road/Boat/AI traffic is all set to 10% (GA Traffic is set to 0).

Just flying in Global+Vector from FSDT CYVR to P3D's KEDW (This is a desert area), I was expecting to be able to land with VAS hovering at 3.2GB.  As soon as KEDW approaches, VAS jumps to 3.9GB-4GB.  I even flew the aircraft with VC view only (entire flight).

Why does the 777 take so much VAS? at this point - it is useless to use this payware craft.  Question is it 777 consuming VAS near approach, or P3D 2.5+ having VAS issues.  During takeoff, the VAS didn't even jump at FSDT's CYVR.

Also - I did notice even just clicking the Menu in P3D2.5, VAS usage jumps.  Something is broken somewhere.

My PC specs are - i7-5820K (4.4ghz), 2 980s, 16GB Ram.