1. Database Reference
  2. Dynamic Performance Views
  3. Dynamic Performance (V$) Views: V$IM_COLUMN_LEVEL to V$RULE_SET_AGGREGATE_STATS
  4. V$MAP_SUBELEMENT

8.72 V$MAP_SUBELEMENT

V$MAP_SUBELEMENT displays a list of all subelement mapping structures in the shared memory of the instance.

Column Datatype Description

CHILD_IDX

NUMBER

Index in V$MAP_ELEMENT corresponding to the child element

PARENT_IDX

NUMBER

Index in V$MAP_ELEMENT corresponding to the parent element

SUB_NUM

NUMBER

Subelement number

SUB_SIZE

NUMBER

Subelement size in HKB

ELEM_OFFSET

NUMBER

Offset in HKB on the child element

SUB_FLAGS

NUMBER

Subelement flags (currently unused)

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