I'm on a client that has a large amount of users around the country, and other users around the world, and they need to segregate the Spotfire Library usage, and I think the best way is to create an option on Spotfire Library to be possible define a size limit for specific folder
Just posted a similar requested via https://ideas.tibco.com/ideas/TS-I-6029
This will be handy but database intensive. Spotfire already stores the item size in the Metadata database, have a look at LIB_ITEMS.CONTENT_SIZE.