'Wait Event'에 해당되는 글 1건

select cast(min(sn.begin_interval_time) over (partition by sn.dbid,sn.snap_id) as date) snap_time,  --workaround to uniform snap_time over all instances in RAC

 --ss.dbid,  --uncomment if you have multiple dbid in your AWR

 sn.instance_number,

    ss.event_name,

 ss.wait_class,

 ss.total_waits,

    ss.time_waited_micro,

 ss.total_waits - lag(ss.total_waits) over (partition by ss.dbid,ss.instance_number,ss.event_id order by sn.snap_id nulls first) Delta_waits,

 ss.time_waited_micro - lag(ss.time_waited_micro) over (partition by ss.dbid,ss.instance_number,ss.event_id order by sn.snap_id nulls first) Delta_timewaited,

 round((ss.total_waits - lag(ss.total_waits) over (partition by ss.dbid,ss.instance_number,ss.event_id order by sn.snap_id nulls first)) /

       (extract(hour from END_INTERVAL_TIME-begin_interval_time)*3600 

              -extract(hour from sn.snap_timezone - lag(sn.snap_timezone) over (partition by ss.dbid,ss.instance_number,ss.event_id order by sn.snap_id nulls first) )*3600 --deals with daylight savings time change

              + extract(minute from END_INTERVAL_TIME-begin_interval_time)* 60

              + extract(second from END_INTERVAL_TIME-begin_interval_time)),2 ) Waits_per_sec,

 round((ss.time_waited_micro - lag(ss.time_waited_micro) over (partition by ss.dbid,ss.instance_number,ss.event_id order by sn.snap_id nulls first)) /

       (extract(hour from END_INTERVAL_TIME-begin_interval_time)*3600

              -extract(hour from sn.snap_timezone - lag(sn.snap_timezone) over (partition by ss.dbid,ss.instance_number,ss.event_id order by sn.snap_id nulls first) )*3600 --deals with daylight savings time change

              + extract(minute from END_INTERVAL_TIME-begin_interval_time)* 60

              + extract(second from END_INTERVAL_TIME-begin_interval_time)),2 ) Rate_timewaited,  -- time_waited_microsec/clock_time_sec

    round((ss.time_waited_micro - lag(ss.time_waited_micro) over (partition by ss.dbid,ss.instance_number,ss.event_id order by sn.snap_id nulls first)) /

           nullif(ss.total_waits - lag(ss.total_waits) over (partition by ss.dbid,ss.instance_number,ss.event_id order by sn.snap_id nulls first),0),2) Avg_wait_time_micro

from dba_hist_system_event ss,

     dba_hist_snapshot sn

where

    sn.snap_id = ss.snap_id

and sn.dbid = ss.dbid

and sn.instance_number = ss.instance_number

and sn.begin_interval_time between sysdate-7 and sysdate

order by sn.snap_id