When any files that are in large size moved out or deleted, the reclaiming of the space at certain operating system level may not be fast enough as soon as the operation is completed and may take time.. Another possibility would be that stats are not updated, worth to analyze the tables that are moved into tablespace.
I've set up a tablespace on a different partition from the main data directory. I moved a few tables and indexes over to the new tablespace and the disk space used in this new tablespace doesn't match the amount of data 'freed up' from the main data directory. The tablespace is sitting at 15 GB used, but the space freed up on the main partition is about 10 GB.
Any thoughts as to why I didn't see as much space freed up as I thought I would?
