V$SYSTEM_EVENT

V$SYSTEM_EVENT displays 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, then you must set TIMED_STATISTICS to TRUE in the parameter file; doing this will have a small negative effect on system performance.

See Also:

"TIMED_STATISTICS"

Column	Datatype	Description
`EVENT`	`VARCHAR2(64)`	Name of the wait event
`TOTAL_WAITS`	`NUMBER`	Total number of waits for the event
`TOTAL_TIMEOUTS`	`NUMBER`	Total number of timeouts for the event
`TIME_WAITED`	`NUMBER`	Total amount of time waited for the event (in hundredths of a second)
`AVERAGE_WAIT`	`NUMBER`	Average amount of time waited for the event (in hundredths of a second)
`TIME_WAITED_MICRO`	`NUMBER`	Total amount of time waited for the event (in microseconds)
`TOTAL_WAITS_FG`	`NUMBER`	Total number of waits for the event, from foreground sessions
`TOTAL_TIMEOUTS_FG`	`NUMBER`	Total number of timeouts for the event, from foreground sessions
`TIME_WAITED_FG`	`NUMBER`	Amount of time waited for the event (in hundredths of a second), from foreground sessions
`AVERAGE_WAIT_FG`	`NUMBER`	Average amount of time waited for the event (in hundredths of a second), from foreground sessions
`TIME_WAITED_MICRO_FG`	`NUMBER`	Amount of time waited for the event (in microseconds), from foreground sessions
`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