SNAP_ID

NUMBER

NOT NULL

Unique snapshot identifier.

DBID

NUMBER

NOT NULL

Database identifier for the snapshot.

CELL_HASH

NUMBER

NOT NULL

Hash number that uniquely identifies the cell.

INCARNATION_NUM

NUMBER

NOT NULL

Incarnation number of the cell.

REASON_ID

NUMBER

NOT NULL

Unique identifier for the I/O reason.

REASON_NAME

VARCHAR2(257)

User readable I/O reason.

REQUESTS

NUMBER

Number of I/O requests performed for the reason.

BYTES

NUMBER

Number of IO Bytes performed for the reason.

CON_DBID

NUMBER

The database identifier.

CON_ID

NUMBER

The identifier of the container identified by CON_DBID. Possible values are as follows:

• 0: This value is used for non-container database (CDB).

• 1: This value is used for the root container of the CDB.

READS

NUMBER

Number of read requests for the reason.

This value includes the flash reads counted in the READS_FD column.

WRITES

NUMBER

Number of write requests for the reason.

This value includes the flash writes counted in the WRITES_FD column.

READS_FD

NUMBER

Number of flash read requests for the reason.

This value is a subset of the value in the READS column.

WRITES_FD

NUMBER

Number of flash write requests for the reason.

This value is a subset of the value in the WRITES column.