sqlflip2.sql

 set lines 155

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--

-- File name:   sqlflip2.sql

--

-- Purpose:     Attempts to find SQL statements with plan instability.

--

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col execs for 999,999,999

col etime for 999,999,999.9

col avg_etime for 999,999.999

col avg_cpu_time for 999,999.999

col avg_lio for 999,999,999.9

col avg_pio for 9,999,999.9

col begin_interval_time for a30

col node for 99999

break on plan_hash_value on startup_time skip 1

select sql_id, plan_hash_value, 

sum(execs) execs, 

-- sum(etime) etime, 

sum(etime)/sum(execs) avg_etime, 

sum(cpu_time)/sum(execs) avg_cpu_time,

sum(lio)/sum(execs) avg_lio, 

sum(pio)/sum(execs) avg_pio

from (

select ss.snap_id, ss.instance_number node, begin_interval_time, sql_id, plan_hash_value,

nvl(executions_delta,0) execs,

elapsed_time_delta/1000000 etime,

(elapsed_time_delta/decode(nvl(executions_delta,0),0,1,executions_delta))/1000000 avg_etime,

buffer_gets_delta lio,

disk_reads_delta pio,

cpu_time_delta/1000000 cpu_time,

(buffer_gets_delta/decode(nvl(buffer_gets_delta,0),0,1,executions_delta)) avg_lio,

(cpu_time_delta/decode(nvl(executions_delta,0),0,1,executions_delta)) avg_cpu_time

from DBA_HIST_SQLSTAT S, DBA_HIST_SNAPSHOT SS

where sql_id = nvl('&sql_id','4dqs2k5tynk61')

and ss.snap_id = S.snap_id

and ss.instance_number = S.instance_number 

-- and executions_delta > 0

)

group by sql_id, plan_hash_value

order by 5

/