1. Database Reference
  2. Static Data Dictionary Views
  3. Static Data Dictionary Views: DBA_2PC_NEIGHBORS to DBA_HIST_JAVA_POOL_ADVICE
  4. DBA_DMT_USED_EXTENTS

4.221 DBA_DMT_USED_EXTENTS

DBA_DMT_USED_EXTENTS describes the extents comprising the segments in all dictionary managed tablespaces in the database.

Column Datatype NULL Description

SEGMENT_FILEID

NUMBER

NOT NULL

File number of the segment header of the extent

SEGMENT_BLOCK

NUMBER

NOT NULL

Block number of the segment header of the extent

TABLESPACE_ID

NUMBER

NOT NULL

Identifier number of the tablespace containing the extent

EXTENT_ID

NUMBER

NOT NULL

Extent number in the segment

FILEID

NUMBER

NOT NULL

File identifier number of the file containing the extent

BLOCK

NUMBER

NOT NULL

Starting block number of the extent

LENGTH

NUMBER

NOT NULL

Number of blocks in the extent