ID

NUMBER

Unique block identifier (that is, the block number)

CHUNK

NUMBER

Chunk to which the block belongs (the upper 27 bits of the ID)

OFFSET

NUMBER

Offset of the block within its chunk (the lower 5 bits of the ID)

FREE

VARCHAR2(3)

Indicates whether the block is free (YES) or not (NO)

OBJECT_ID

NUMBER

Cache object to which the memory block belongs; NULL if the memory block is not allocated to a cache object (FREE = YES)

POSITION

NUMBER

Position of the block in the cached object; NULL if the memory block is not allocated to a cache object (FREE = YES)

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