GROUP_NUMBER

NUMBER

Cluster-wide number assigned to the disk group (composite primary key)

VOLUME_NAME

VARCHAR2(30)

Name of the volume

COMPOUND_INDEX

NUMBER

A 32-bit number consisting of a disk group number in the high-order 8 bits and a volume number in the low-order 24 bits (for efficient access to the view)

VOLUME_NUMBER

NUMBER

Number of the Volume within the disk group (composite primary key)

READS

NUMBER

Total number of read requests for this volume

WRITES

NUMBER

Total number of write requests for this volume

READ_ERRS

NUMBER

Total number of failed read I/O operations for this volume

WRITE_ERRS

NUMBER

Total number of failed write I/O operations for this volume

READ_TIME

NUMBER

Total I/O time (in seconds) for read requests for this volume

WRITE_TIME

NUMBER

Total I/O time (in seconds) for write requests for this volume

BYTES_READ

NUMBER

Total number of bytes read for this volume

BYTES_WRITTEN

NUMBER

Total number of bytes written for this volume

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

For this view, the value is always 0.