17:13:01 < esotericnonsense> Aaaaand: in particular what was happening for me was that the utxo cache seemingly was being dropped on every prune event
17:13:18 < esotericnonsense> so with prune off, it'd build up to 2-3GB or more, with it on, it'd never go above 300mb or so

We should probably add the dbcache size to the amount of extra blockdata that prune lets the blocks and disk take up over the pruning size... so that pruning doesn't undermine the user's dbcache settings.