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Oracle® Database Reference
11g Release 2 (11.2)

E40402-15
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V$SESSION_EVENT

V$SESSION_EVENT displays information on waits for an event by a session. Note that the TIME_WAITED and AVERAGE_WAIT columns will contain a value of zero on those platforms that do not support a fast timing mechanism. If you are running on one of these platforms and you want this column to reflect true wait times, then you must set TIMED_STATISTICS to true in the parameter file; doing this will have a small negative effect on system performance.

Column Datatype Description
SID NUMBER ID of the session
EVENT VARCHAR2(64) Name of the wait event

See Also: Appendix C, "Oracle Wait Events"

TOTAL_WAITS NUMBER Total number of waits for the event by the session
TOTAL_TIMEOUTS NUMBER Total number of timeouts for the event by the session
TIME_WAITED NUMBER Total amount of time waited for the event by the session (in hundredths of a second)
AVERAGE_WAIT NUMBER Average amount of time waited for the event by the session (in hundredths of a second)
MAX_WAIT NUMBER Maximum time waited for the event by the session (in hundredths of a second)
TIME_WAITED_MICRO NUMBER Total amount of time waited for the event by the session (in microseconds)
EVENT_ID NUMBER Identifier of the wait event
WAIT_CLASS_ID NUMBER Identifier of the class of the wait event
WAIT_CLASS# NUMBER Number of the class of the wait event
WAIT_CLASS VARCHAR2(64) Name of the class of the wait event