4.302 DBA_HIST_COMP_IOSTAT

DBA_HIST_COMP_IOSTAT displays information about I/O statistics aggregated on the component level.

Column	Datatype	NULL	Description
SNAP_ID	NUMBER	NOT NULL	Unique snapshot ID
DBID	NUMBER	NOT NULL	Database ID for the snapshot
INSTANCE_NUMBER	NUMBER	NOT NULL	Instance number for the snapshot
COMPONENT	VARCHAR2(64)	NOT NULL	Component name
FILE_TYPE	VARCHAR2(64)	NOT NULL	File type
IO_TYPE	CHAR(5)	NOT NULL	The type of I/O performed
OPERATION	CHAR(5)	NOT NULL	Operation name
BYTES	NUMBER	NOT NULL	Number of bytes
IO_COUNT	NUMBER	NOT NULL	Number of I/Os that were performed
CON_DBID	NUMBER		The database ID of the PDB for the sampled session
CON_ID	NUMBER		The ID of the container that CON_DBID identifies. 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