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
`CON_ID`	`NUMBER`	The ID of the container to which the data pertains. 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

Note:

This view returns instance-wide data and a value of 0 in the CON_ID column when queried from the root of a CDB.