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