As with all the other attributes of database objects discussed in this course, you can explore the settings for storage parameters through views in the data dictionary.
There are other data dictionary views that provide information about how your Oracle database is
using its storage space:
You can use the Storage Manager component of the Oracle Enterprise Manager, as shown in the following simulation,
to check the available space in a tablespace as well as some of the dependencies on the tablespace.
Data Dictionary Extents
The next lesson demonstrates how Oracle uses free space within data blocks.