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Oracle® Database Reference
12c Release 1 (12.1)

E17615-23
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V$HEAT_MAP_SEGMENT

V$HEAT_MAP_SEGMENT displays real-time segment access information.

Column Datatype Description
OBJECT_NAME VARCHAR2(128) Name of the object
SUBOBJECT_NAME VARCHAR2(128) Name of the subobject
OBJ# NUMBER Object number
DATAOBJ# NUMBER Data object number
TRACK_TIME DATE Timestamp of current activity tracking
SEGMENT_WRITE VARCHAR2(3) Indicates whether the segment has write access: (YES or NO)
SEGMENT_READ VARCHAR2(3) Indicates whether the segment has read access: (YES or NO)
FULL_SCAN VARCHAR2(3) Indicates whether the segment has full table scan: (YES or NO)
LOOKUP_SCAN VARCHAR2(3) Indicates whether the segment has lookup scan: (YES or NO)
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

The Heat Map feature is not supported in CDBs in Oracle Database 12c, so the value in this column can be ignored.