2.144 HEAT_MAP

Use HEAT_MAP to enable or disable both the Heat Map and Automatic Data Optimization (ADO) features.

Property	Description
Parameter type	String
Syntax	HEAT_MAP = { ON | OFF }
Default value	OFF
Modifiable	ALTER SESSION, ALTER SYSTEM
Modifiable in a PDB	Yes
Basic	No
Oracle RAC	If specified, use the same value on all instances

Setting the HEAT_MAP initialization parameter to ON causes the database to track read and write access of all segments, as well as modification of database blocks, due to DMLs and DDLs. These activities are not tracked for objects in the SYSTEM and SYSAUX tablespaces.

See Also:

• Oracle Database VLDB and Partitioning Guide for more information about enabling and disabling the Heat Map feature

• Oracle Database VLDB and Partitioning Guide for more information about Heat Map tracking