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Oracle® Database Reference
12c Release 1 (12.1)

E17615-23
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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.