V$WAITSTAT

V$WAITSTAT displays block contention statistics. This table is only updated when timed statistics are enabled.

Column	Datatype	Description
`CLASS`	`VARCHAR2(18)`	Class of the block
`COUNT`	`NUMBER`	Number of waits by this `OPERATION` for this `CLASS` of block
`TIME`	`NUMBER`	Sum of all wait times for all the waits by this `OPERATION` for this `CLASS` of block