V$SYSTEM_WAIT_CLASS

V$SYSTEM_WAIT_CLASS displays the instance-wide time totals for each registered wait class.

Column	Datatype	Description
`WAIT_CLASS_ID`	`NUMBER`	Identifier of the wait class
`WAIT_CLASS#`	`NUMBER`	Number of the wait class
`WAIT_CLASS`	`VARCHAR2(64)`	Name of the wait class
`TOTAL_WAITS`	`NUMBER`	Number of times waits of the class occurred
`TIME_WAITED`	`NUMBER`	Amount of time (in hundredths of a second) spent in the wait by all sessions in the instance
`TOTAL_WAITS_FG`	`NUMBER`	Number of times waits from this wait class occurred in foreground sessions
`TIME_WAITED_FG`	`NUMBER`	Amount of time (in hundredths of a second) spent in waits from this wait class in foreground sessions