System selector

Question	Primary evidence/system
Why is this asset loaded?	Reference Viewer/Reference Tree, Asset Manager audit
What owns retained CPU memory?	Memory Insights + LLM tags/callstacks
What owns GPU memory?	Render Resource Viewer + platform/RHI metrics
Why are textures blurry or thrashing?	stat streaming, texture accuracy/resolution views
Why do virtual textures show low-res tiles?	VT pool stats/visualization and feedback/upload demand
Why does entering a region hitch?	Asset Loading Insights, file/loadtime trace, World Partition evidence
Why does first rendering hitch?	PSO precache validation and Shader Pipeline Cache hitch stats
Why does geometry pop or stream forever?	Nanite stats/pool or World Partition readiness
Why did memory grow after repeated action?	marked Memory Insights allocation query

Do not combine all streaming systems into one “pool.” Each has separate ownership, telemetry, eviction, and quality behavior.