That’s a good point - I’ve seen free memory drop every time I’ve built the larger file systems (and not from just the cache), but I never tried to quantify it. And I don’t see any good stats or notes on it.
seems like no one is building these larger systems on boxes small enough for it to matter, or at least google isn’t finding it.
Another way of saying this is that RAM usage doesn't meaningfully scale with storage size in scope of storage systems encountered by actual non theoretical people because the minimum ram available on any system one encounters is sufficient to service the amount of storage that it is possible to use on said system.
seems like no one is building these larger systems on boxes small enough for it to matter, or at least google isn’t finding it.