V$SYSTEM_EVENT

This view contains information on total waits for an event. 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, 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
EVENT	VARCHAR2(64)	The name of the wait event
TOTAL_WAITS	NUMBER	The total number of waits for this event
TOTAL_TIMEOUTS	NUMBER	The total number of timeouts for this event
TIME_WAITED	NUMBER	The total amount of time waited for this event, in hundredths of a second
AVERAGE_WAIT	NUMBER	The average amount of time waited for this event, in hundredths of a second