47 lines
1.1 KiB
SQL
47 lines
1.1 KiB
SQL
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/* wait event latency averaged over each hour
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output looks like
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BTIME AVG_MS
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--------------- ----------
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20-JUL-11 06:00 5.854
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20-JUL-11 07:00 4.116
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20-JUL-11 08:00 21.158
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20-JUL-11 09:02 5.591
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20-JUL-11 10:00 4.116
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20-JUL-11 11:00 6.248
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20-JUL-11 12:00 23.634
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20-JUL-11 13:00 22.529
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20-JUL-11 14:00 21.62
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20-JUL-11 15:00 18.038
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20-JUL-11 16:00 23.127
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*/
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select
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btime,
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round((time_ms_end-time_ms_beg)/nullif(count_end-count_beg,0),3) avg_ms
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from (
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select
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to_char(s.BEGIN_INTERVAL_TIME,'DD-MON-YY HH24:MI') btime,
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total_waits count_end,
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time_waited_micro/1000 time_ms_end,
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Lag (e.time_waited_micro/1000)
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OVER( PARTITION BY e.event_name ORDER BY s.snap_id) time_ms_beg,
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Lag (e.total_waits)
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OVER( PARTITION BY e.event_name ORDER BY s.snap_id) count_beg
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from
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DBA_HIST_SYSTEM_EVENT e,
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DBA_HIST_SNAPSHOT s
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where
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s.snap_id=e.snap_id
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and e.event_name like '%&1%'
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order by begin_interval_time
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)
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order by btime
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/
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