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2026-03-12 21:23:47 +01:00
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vg/awr_parameter2.sql Normal file
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@@header
/*
*
* Author : Vishal Gupta
* Purpose : Display database parameter changes from AWR Repository
* Parameters : 1 - Parameter Name (Use % as wild card and \ as escape character)
* 2 - Instance Number ( Use % to query for all instances)
* 3 - Number of days to query ( Default 30)
*
* Revision History:
* ===================
* Date Author Description
* --------- ------------ -----------------------------------------
* 02-Nov-13 Vishal Gupta Modified to use multiple value view
* (DBA_HIST_PARAMETER -> DBA_HIST_MVPARAMETER)
* 05-Jul-12 Vishal Gupta Created
*
*/
/************************************
* INPUT PARAMETERS
************************************/
VARIABLE PARAM_NAME VARCHAR2(100)
VARIABLE INST_ID VARCHAR2(100)
VARIABLE DAYS VARCHAR2(100)
BEGIN
:PARAM_NAME:= '&&1';
:INST_ID := '&&2';
:DAYS := '&&3';
:PARAM_NAME := CASE WHEN NVL(:PARAM_NAME,'x') = 'x' THEN '%' ELSE :PARAM_NAME END;
:INST_ID := CASE WHEN NVL(:INST_ID,'x') = 'x' THEN '%' ELSE :INST_ID END;
:DAYS := CASE WHEN NVL(:DAYS,'x') = 'x' THEN '7' ELSE :DAYS END;
END;
/
set head off
SELECT '**********************************************' || chr(10) ||
'* init.ora Parameter Change History' || chr(10) ||
'* (From AWR Repository)' || chr(10) ||
'*' || chr(10) ||
'* Input Parameters' || chr(10) ||
'* - Parameter Name = "' || :PARAM_NAME || '"' || chr(10) ||
'* - Instance# = "' || :INST_ID || '"' || chr(10) ||
'* - Days = "' || :DAYS || '"' || chr(10) ||
'**********************************************' || chr(10) ||
''
FROM DUAL;
set head on
COLUMN end_interval_time HEADING "Snapshot Time" FORMAT a18
COLUMN instance_number HEADING "I#" FORMAT 99
COLUMN parameter_name HEADING "ParameterName" FORMAT a30
COLUMN value HEADING "Current Value" FORMAT a50
COLUMN prev_value HEADING "Previous Value" FORMAT a50
WITH snapshots
AS
(
SELECT s.dbid
, s.instance_number
, s.snap_id
, s.end_interval_time
, lag(s.snap_id) OVER (PARTITION BY s.dbid, s.instance_number
ORDER BY s.dbid, s.instance_number, s.snap_id) prev_snap_id
FROM v$database d
JOIN dba_hist_snapshot s ON s.dbid = d.dbid
WHERE s.end_interval_time > SYSDATE - :DAYS - 5/24 -- Check for 5 extra hours in past
AND s.instance_number LIKE :INST_ID
)
select TO_CHAR(s.end_interval_time,'DD-MON-YY HH24:MI:SS') end_interval_time
, p.instance_number
, pn.parameter_name
--, p.ordinal
, p.VALUE
, prev.value prev_value
FROM snapshots s
JOIN dba_hist_parameter_name pn ON s.dbid = pn.dbid
-- multi value parameter view
LEFT OUTER JOIN dba_hist_mvparameter prev ON prev.dbid = s.dbid
AND prev.instance_number = s.instance_number
AND prev.snap_id = s.prev_snap_id
AND prev.parameter_hash = pn.parameter_hash
OUTER JOIN dba_hist_mvparameter p ON p.dbid = s.dbid
AND p.instance_number = s.instance_number
AND p.snap_id = s.snap_id
AND p.parameter_hash = pn.parameter_hash
AND NVL(p.value,'x') = NVL(prev.value,'x')
WHERE NVL(pn.parameter_name,'x') LIKE :PARAM_NAME
--AND REPLACE(pn.parameter_name,'_','!') NOT LIKE '!!%' -- Filter AMM or ASMM modified parameters if in AWR.
AND pn.parameter_name NOT LIKE '\_\_%' ESCAPE '\' -- Filter AMM or ASMM modified parameters if in AWR.
AND NVL(p.VALUE,'x') NOT LIKE '%SYS.KUPC$%' -- Ignore DataPump export/import service name change
AND NVL(p.value,'x') <> NVL(prev.value,'x')
ORDER BY TO_DATE(TO_CHAR(s.end_interval_time,'DD-MON-YY HH24:MI'),'DD-MON-YY HH24:MI')
, pn.parameter_name
, s.instance_number
;
@@footer