Oracle–查询latch free 等待事件相关信息

--查询latch free 等待事件相关信息
     COL event FORMAT a20;
     COL waits FORMAT 9999990;
     COL timeouts FORMAT 99999990;
     COL average FORMAT 99999990;
     SELECT event          "Event",
            time_waited    "Total Time",
            total_waits    "Waits",
            average_wait   "Average",
            total_timeouts "Timeouts"
       FROM V$SYSTEM_EVENT
     WHERE event = 'latch free'
     ORDER BY EVENT;    


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