V$HEAT_MAP_SEGMENT

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

TS#¹

NUMBER

ID of the tablespace containing the segment whose heat map is tracked

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.