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Oracle® Database Reference
12c Release 1 (12.1)

E17615-24
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V$SESSION_WAIT_CLASS

V$SESSION_WAIT_CLASS displays the time spent in various wait event operations on a per-session basis.

Column Datatype Description
SID NUMBER Session identifier
SERIAL# NUMBER Serial number
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 for the session
TIME_WAITED NUMBER Amount of time spent in the wait class by the session
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