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Oracle® Database Reference
12c Release 1 (12.1)

E17615-23
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V$FILESPACE_USAGE

V$FILESPACE_USAGE summarizes space allocation information of each data file and temp file.

Column Datatype Description
TABLESPACE_ID NUMBER ID of the tablespace to which the file belongs
RFNO NUMBER Relative file number of the file
ALLOCATED_SPACE NUMBER Total allocated space in the file
FILE_SIZE NUMBER Current file size
FILE_MAXSIZE NUMBER Maximum file size
CHANGESCN_BASE NUMBER SCN base of the last change to the file
CHANGESCN_WRAP NUMBER SCN wrap of the last change to the file
FLAG NUMBER Flags for file attributes
CON_ID NUMBER The ID of the container to which the data pertains. Possible values include:
  • 0: This value is used for rows containing data that pertain to the entire CDB. This value is also used for rows in non-CDBs.

  • 1: This value is used for rows containing data that pertain to only the root

  • n: Where n is the applicable container ID for the rows containing data