It's important to be able to accurately estimate the size of datebases at time of design, especially if scaling is involved.
This article describes the basic size calculations, and also includes an automated calculator:
What's missing is indexing, and how this affects the size. There is no mention of this anywhere on the website in fact.
Observations from some simple testing with 1M nodes:
Can you confirm or comment on this please?
Suggest indexing to be included in documentation, and in the online calculator please.