Oracle 10g onwards, The SYSAUX an auxiliary tablespace to the SYSTEM
tablespace created in your database.
Some database components that formerly created and used separate tablespaces
now occupy the SYSAUX tablespace.
Below table shows the components that uses the SYSAUX tablespace as their default tablespace and
the tablespace in which they were stored in earlier releases.
Component
Using SYSAUX
Tablespace in
Earlier Releases
Analytical Workspace
Object Table
SYSTEM
Enterprise Manager
Repository
...