In Oracle, a Temporary Tablespace is a special type of tablespace that is used to store temporary data, such as intermediate results of queries or data that is being processed. It is created automatically by Oracle when a database is created and is used to store temporary data for all users.
It is important to monitor the size and usage of the temporary tablespace to ensure that it does not become full, which can lead to performance problems. Several methods can be used to check the temp tablespace usage, including using the V$TEMP_SPACE_USAGE view or the DBA_TEMP_SPACE_USAGE view.