Size of library folder

Hello
A while ago i added a pictures-folder to my library. The folder had extremely lot of pictures and when it was done indexing the library folder was like 7 gigs.
This is a while ago and i removed this folder from the library a few days after i added it. I now notice that the library folder is still the same size.
Is this normal?
I also tested once, checking size of the library dir before and after renaming a bunch of files (1000+ files) in one of the shared folders. Everything looked OK on the clients with the new file-names but the libraryfolder just got even bigger.
I thought serviio automatically refreshed/reindexed the database to avoid using unnessecary diskspace for libraryfiles?
A while ago i added a pictures-folder to my library. The folder had extremely lot of pictures and when it was done indexing the library folder was like 7 gigs.
This is a while ago and i removed this folder from the library a few days after i added it. I now notice that the library folder is still the same size.
Is this normal?
I also tested once, checking size of the library dir before and after renaming a bunch of files (1000+ files) in one of the shared folders. Everything looked OK on the clients with the new file-names but the libraryfolder just got even bigger.
I thought serviio automatically refreshed/reindexed the database to avoid using unnessecary diskspace for libraryfiles?