V$IOSTAT_FUNCTION

V$IOSTAT_FUNCTION displays disk I/O statistics for database functions (such as the LGWR and DBWR).

Column	Datatype	Description
`FUNCTION_ID`	`NUMBER`	Function ID
`FUNCTION_NAME`	`VARCHAR2(18)`	Function name
`SMALL_READ_MEGABYTES`	`NUMBER`	Number of single block megabytes read
`SMALL_WRITE_MEGABYTES`	`NUMBER`	Number of single block megabytes written
`LARGE_READ_MEGABYTES`	`NUMBER`	Number of multiblock megabytes read
`LARGE_WRITE_MEGABYTES`	`NUMBER`	Number of multiblock megabytes written
`SMALL_READ_REQS`	`NUMBER`	Number of single block read requests
`SMALL_WRITE_REQS`	`NUMBER`	Number of single block write requests
`LARGE_READ_REQS`	`NUMBER`	Number of multiblock read requests
`LARGE_WRITE_REQS`	`NUMBER`	Number of multiblock write requests
`NUMBER_OF_WAITS`	`NUMBER`	Number of I/O waits by functionality
`WAIT_TIME`	`NUMBER`	Total wait time (in milliseconds)