Wait events since startup of the instance.
Columns EVENT TOTAL_WAITS TOTAL_TIMEOUTS TIME_WAITED AVERAGE_WAIT TIME_WAITED_MICRO
total_waits = A count of all wait events since startup of the instance.
time_waited = The sum of the wait times for all events in hundreth of a second. (requires timed_statistics=true)
time_waited_micro = wait times in millionths of a second.
Related:
V$ENQUEUE_STAT V$GLOBAL_TRANSACTION V$SESSION_EVENT V$SHARED_POOL_RESERVED V$SORT_SEGMENT V$SORT_USAGE V$STATNAME V$SYSSTAT V$SYSTEM_CURSOR_CACHE V$TRANSACTION