Images saved as Icons or Streaming Tags can be deleted after a configurable amount of time or based on storage availability. It is more likely that storage space is more important than time.
The DB Objects Auto-Delete option under Life Cycle Management of the System Configuration provides two options for deleting database objects, Icons or Streaming Tags:
Set Icons Storage Limit
No Icons Storage Limit
If the No Icons Storage Limit is selected, the storage information is displayed in linear format of both the Icons Tablespace Size and the Current Storage used.
If the Set Icons Storage Limit is selected, the screen expands to display Icons Auto-Delete Settings. You can specify to manually set the storage limit or allow the system to calculate the storage limit by icons sized based on the number of months entered into the field.
The storage limits are displayed in cylindrical form based on either the automatic calculation or the specified parameters. The delete mechanism always deletes the oldest information first.
See this topic: