We’re working on a scene at the moment which for whatever reason is breaking the 64gb ram barrier - even with geometry set to dynamic. What would be good are more diagnostic outputs, like a render element which shows memory usage per bucket (normalized against the dynamic memory limit).
There are option to control the verbosity of the VRay Log, maybe it’ll help?
More detailed diagnostics for RAM usage are on the “to do” list.
Best regards,
Vlado