The do_space and do_views workspaces provide information about Derived Objects (DOs) in VOBs on this host. The do_space workspace shows how space is being consumed by DOs in all VOBs. The do_views workspace filters this information to show which views hold references to DOs in a given VOB. If there are unused views holding such references, removing them can help reduce the VOB's disk space needs.
Related topics:
Organization of the predefined workspaces