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vg/awr_xplan_unstable.sql Normal file
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@@header
/*
*
* Author : Vishal Gupta
* Purpose : Display unstable execution plan from AWR
* Version :
* Parameters : 1 - From Timestamp (YYYY-MM-DD HH24:MI:SS)
* 2 - To Timestamp (YYYY-MM-DD HH24:MI:SS)
* 3 - Top record Count
*
* Revision History:
* ===================
* Date Author Description
* --------- ------------ -----------------------------------------
* 12-Jun-12 Vishal Gupta Intial version
*
*
*/
/************************************
* INPUT PARAMETERS
************************************/
UNDEFINE FROM_TIMESTAMP
UNDEFINE TO_TIMESTAMP
UNDEFINE TOP_RECORDCOUNT
DEFINE FROM_TIMESTAMP="&&1"
DEFINE TO_TIMESTAMP="&2"
DEFINE TOP_RECORDCOUNT="&3"
COLUMN _FROM_TIMESTAMP NEW_VALUE FROM_TIMESTAMP NOPRINT
COLUMN _TO_TIMESTAMP NEW_VALUE TO_TIMESTAMP NOPRINT
COLUMN _TOP_RECORDCOUNT NEW_VALUE TOP_RECORDCOUNT NOPRINT
set term off
SELECT DECODE('&&FROM_TIMESTAMP','',to_char(sysdate - 7 - (1/1440),'YYYY-MM-DD HH24:MI:SS'),'&&FROM_TIMESTAMP') "_FROM_TIMESTAMP"
, DECODE('&&TO_TIMESTAMP','',to_char(sysdate + (1/1440),'YYYY-MM-DD HH24:MI:SS'),'&&TO_TIMESTAMP') "_TO_TIMESTAMP"
, DECODE('&&TOP_RECORDCOUNT','','20','&&TOP_RECORDCOUNT') "_TOP_RECORDCOUNT"
FROM DUAL
;
set term on
PROMPT
PROMPT ***********************************************************************
PROMPT * Top &&TOP_RECORDCOUNT SQLIds with unstable execution plan
PROMPT ***********************************************************************
COLUMN force_matching_signature HEADING "Force Matching Signature" FORMAT 999999999999999999999
COLUMN elapsed_time_perexec_max HEADING "Max|Elapsed|Time|(sec)" FORMAT 999,999,999.999
COLUMN elapsed_time_perexec_min HEADING "Min|Elapsed|Time|(sec)" FORMAT 999,999,999.999
COLUMN elapsed_time_perexec_avg HEADING "Avg|Elapsed|Time|(sec)" FORMAT 999,999,999.999
COLUMN elapsed_time_perexec_deviation HEADING "Deviation|Elapsed|Time|(sec)" FORMAT 999,999,999.999
SELECT *
FROM
(
SELECT ss.force_matching_signature
, max(ss.sql_id) sql_id
, max(ss.elapsed_time_total/1000000/ss.executions_total) elapsed_time_perexec_max
, min(ss.elapsed_time_total/1000000/ss.executions_total) elapsed_time_perexec_min
, avg(ss.elapsed_time_total/1000000/ss.executions_total) elapsed_time_perexec_avg
, (max(ss.elapsed_time_total/1000000/ss.executions_total)
- avg(ss.elapsed_time_total/1000000/ss.executions_total)
)
/ avg(ss.elapsed_time_total/1000000/ss.executions_total) elapsed_time_perexec_deviation
FROM v$database d
, dba_hist_snapshot s
, dba_hist_sqlstat ss
-- , dba_hist_sql_plan p
WHERE d.dbid = s.dbid
AND ss.dbid = s.dbid
AND ss.instance_number = s.instance_number
AND ss.snap_id = s.snap_id
-- AND p.dbid = ss.dbid (+)
-- AND p.sql_id = ss.sql_id (+)
-- AND p.plan_hash_value = ss.plan_hash_value (+)
-- AND p.id = 0 -- Top row which has cost as well
AND s.begin_interval_time BETWEEN TO_TIMESTAMP('&&from_timestamp','YYYY-MM-DD HH24:MI:SS')
AND TO_TIMESTAMP('&&to_timestamp','YYYY-MM-DD HH24:MI:SS')
AND s.end_interval_time BETWEEN TO_TIMESTAMP('&&from_timestamp','YYYY-MM-DD HH24:MI:SS')
AND TO_TIMESTAMP('&&to_timestamp','YYYY-MM-DD HH24:MI:SS')
AND ss.force_matching_signature <> 0
AND ss.executions_delta > 0
AND ss.executions_total > 0
AND ss.elapsed_time_total > 0
GROUP BY ss.force_matching_signature
/*
HAVING (max(ss.elapsed_time_total/1000000/ss.executions_total)
- avg(ss.elapsed_time_total/1000000/ss.executions_total)
)
/ avg(ss.elapsed_time_total/1000000/ss.executions_total) > 0.1
*/
ORDER BY elapsed_time_perexec_deviation desc
)
WHERE ROWNUM <= &&TOP_RECORDCOUNT
/
UNDEFINE FROM_TIMESTAMP
UNDEFINE TO_TIMESTAMP
UNDEFINE TOP_RECORDCOUNT
@@footer