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V$MAP_FILE_EXTENT

V$MAP_FILE_EXTENT displays a list of all file extent mapping structures in the shared memory of the instance.

Column Datatype Description
FILE_MAP_IDX NUMBER File index (corresponds to FILE_MAP_IDX in V$MAP_FILE)
EXT_NUM NUMBER File extent number
EXT_ELEM_OFF NUMBER Element offset in HKB
EXT_SIZE NUMBER File extent size in HKB
EXT_FILE_OFF NUMBER File Offset in HKB
EXT_TYPE VARCHAR2(6) File Extent Type:
  • DATA

  • PARITY

  • NONE

ELEM_IDX NUMBER Index in V$MAP_ELEMENT corresponding to the element where the file extent resides