What objects are contained in SYSAUX tablespace?
Similar to the SYSTEM tablespace, the SYSAUX tablespace is meant to be used for storing Oracle System objects. Although the database will not prevent users from placing non-system objects in the tablespace, it is in general a good practice for users to avoid doing that. In Oracle 10g, there are around 20 occupants of the SYSAUX tablespace. Examples of occupants are: the Automatic Workload repository (AWR), Oracle Streams, LogMiner, etc. Each occupant has its own space consumption policy. The current amount of space occupied by each SYSAUX occupant can be obtained by querying the V$SYSAUX_OCCUPANTS view. The SPACE_USAGE_KBYTES column shows the number of Kbytes used by each of the occupants.