Heavy CPU Utilization of Dictionary Query - After 9i to 10g Upgrade

Question

Hi Friends,
We have migrated our production DB from Oracle 9i(Windows) to Oracle 10g(AIX) and after that a heavy cpu utilization query is coming frequently and hence many timeouts are happening in the application.
Application is connecting to the database through Java Application (JDBC).
Once the application service is started, below query is invoked and CPU takes around 20% continuously.
The interesting thing is this query is not owned by the application schema but by SYS and it's invoked from Application Schema.
We have raised an SR but still no luck.
Any help will be very much appreciated.
SELECT -- Packaged procedures with no arguments package_name AS procedu
re_cat, owner AS procedure_schem, object_name AS procedure_name, NULL
, NULL, NULL, 'Packaged procedure' AS remarks, 1 AS procedure_type
FROM all_arguments WHERE argument_name IS NULL AND data_type IS NULL AN
D package_name LIKE :3 ESCAPE '/' AND owner LIKE :4 ESCAPE '/' AND obje
ct_name LIKE :5 ESCAPE '/' UNION ALL SELECT -- Packaged procedures with a
rguments package_name AS procedure_cat, owner AS procedure_schem, obj
ect_name AS procedure_name, NULL, NULL, NULL, 'Packaged procedure'
AS remarks, 1 AS procedure_type FROM all_arguments WHERE argument_name IS
NOT NULL AND position = 1 AND position = sequence AND package_name L
IKE :3 ESCAPE '/' AND owner LIKE :4 ESCAPE '/' AND object_name LIKE :5
ESCAPE '/' UNION ALL SELECT -- Packaged functions package_name AS proce
dure_cat, owner AS procedure_schem, object_name AS procedure_name, NU
LL, NULL, NULL, 'Pa
Regards,
Savad
Edited by: user9292816 on May 9, 2011 4:35 AM

Answer 1

Hi,
We couldn't find anything in the alert log related to this.
But we have taken the explain plan from both DBs as shown below.
PLan of the Query in Oracle 9.2.0.8(Windows - Old DB )
SQL> select * from table(dbms_xplan.display());
| Id | Operation | Name | Rows | Bytes | Cost |
| 0 | SELECT STATEMENT | | | | |
| 1 | SORT ORDER BY | | | | |
|* 2 | FILTER | | | | |
|* 3 | TABLE ACCESS BY INDEX ROWID | ARGUMENT$ | | | |
| 4 | NESTED LOOPS | | | | |
| 5 | NESTED LOOPS | | | | |
| 6 | TABLE ACCESS BY INDEX ROWID| USER$ | | | |
|* 7 | INDEX RANGE SCAN | I_USER1 | | | |
| 8 | TABLE ACCESS BY INDEX ROWID| OBJ$ | | | |
|* 9 | INDEX RANGE SCAN | I_OBJ2 | | | |
|* 10 | INDEX RANGE SCAN | I_ARGUMENT2 | | | |
|* 11 | FIXED TABLE FULL | X$KZSPR | | | |
|* 12 | TABLE ACCESS BY INDEX ROWID | OBJAUTH$ | | | |
| 13 | NESTED LOOPS | | | | |
| 14 | FIXED TABLE FULL | X$KZSRO | | | |
|* 15 | INDEX RANGE SCAN | I_OBJAUTH2 | | | |
Predicate Information (identified by operation id):
2 - filter("SYS_ALIAS_1"."OWNER#"=:B1 OR EXISTS (SELECT /*+ */ 0 FROM
"X$KZSPR" "X$KZSPR" WHERE "X$KZSPR"."INST_ID"=:B2 AND
((-"X$KZSPR"."KZSPRPRV")=(-144) OR (-"X$KZSPR"."KZSPRPRV")=(-141))) OR EXISTS
(SELECT 0 FROM "SYS"."OBJAUTH$" "OBJAUTH$","X$KZSRO" "X$KZSRO" WHERE
"OBJAUTH$"."OBJ#"=:B3 AND "OBJAUTH$"."GRANTEE#"="X$KZSRO"."KZSROROL" AND
"OBJAUTH$"."PRIVILEGE#"=12))
3 - filter(("A"."ARGUMENT" LIKE :Z ESCAPE '/' OR "A"."ARGUMENT" IS NULL AND
DECODE("A"."TYPE#",0,NULL,1,DECODE("A"."CHARSETFORM",2,'NVARCHAR2','VARCHAR2'),2,
DECODE("A"."SCALE",(-127),'FLOAT','NUMBER'),3,'NATIVE
INTEGER',8,'LONG',9,DECODE("A"."CHARSETFORM",2,'NCHAR
VARYING','VARCHAR'),11,'ROWID',12,'DATE',23,'RAW',24,'LONG
RAW',29,'BINARY_INTEGER',69,'ROWID',96,DECODE("A"."CHARSETFORM",2,'NCHAR','CHAR')
,102,'REF CURSOR',104,'UROWID',105,'MLSLABEL',106,'MLSLABEL',110,'REF',111,'REF',
112,DECODE("A"."CHARSETFORM",2,'NCLOB','CLOB'),113,'BLOB',114,'BFILE',115,'CFILE'
,121,'OBJECT',122,'TABLE',123,'VARRAY',178,'TIME',179,'TIME WITH TIME
ZONE',180,'TIMESTAMP',181,'TIMESTAMP WITH TIME ZONE',231,'TIMESTAMP WITH LOCAL
TIME ZONE',182,'INTERVAL YEAR TO MONTH',183,'INTERVAL DAY TO SECOND',250,'PL/SQL
RECORD',251,'PL/SQL TABLE',252,'PL/SQL BOOLEAN','UNDEFINED') IS NOT NULL) AND
DECODE("A"."PROCEDURE$",NULL,NULL,"SYS_ALIAS_1"."NAME") LIKE :Z ESCAPE '/' AND
NVL("A"."PROCEDURE$","SYS_ALIAS_1"."NAME") LIKE :Z ESCAPE '/')
7 - access("U"."NAME" LIKE :Z ESCAPE '/')
filter("U"."NAME" LIKE :Z ESCAPE '/')
9 - access("SYS_ALIAS_1"."OWNER#"="U"."USER#")
10 - access("SYS_ALIAS_1"."OBJ#"="A"."OBJ#")
11 - filter("X$KZSPR"."INST_ID"=:B1 AND ((-"X$KZSPR"."KZSPRPRV")=(-144) OR
(-"X$KZSPR"."KZSPRPRV")=(-141)))
12 - filter("OBJAUTH$"."PRIVILEGE#"=12)
15 - access("OBJAUTH$"."GRANTEE#"="X$KZSRO"."KZSROROL" AND
"OBJAUTH$"."OBJ#"=:B1)
Note: rule based optimization
PLan of the Query in Oracle 10.2.0.5.3(AIX - New DB )
?PLAN_TABLE_OUTPUT
Plan hash value: 2991281545
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 1 | 109 | 451 (3)| 00:00:06 |
| 1 | SORT ORDER BY | | 1 | 109 | 451 (3)| 00:00:06 |
|* 2 | FILTER | | | | | |
|* 3 | HASH JOIN | | 3 | 327 | 450 (3)| 00:00:06 |
|* 4 | HASH JOIN | | 12 | 1128 | 448 (3)| 00:00:06 |
|* 5 | TABLE ACCESS FULL | ARGUMENT$ | 4821 | 291K| 259 (3)| 00:00:04 |
| 6 | TABLE ACCESS FULL | OBJ$ | 56329 | 1760K| 187 (2)| 00:00:03 |
| 7 | TABLE ACCESS BY INDEX ROWID| USER$ | 6 | 90 | 2 (0)| 00:00:01 |
|* 8 | INDEX RANGE SCAN | I_USER1 | 2 | | 1 (0)| 00:00:01 |
|* 9 | FIXED TABLE FULL | X$KZSPR | 1 | 26 | 0 (0)| 00:00:01 |
| 10 | NESTED LOOPS | | 2 | 50 | 2 (0)| 00:00:01 |
|* 11 | INDEX RANGE SCAN | I_OBJAUTH1 | 1 | 12 | 2 (0)| 00:00:01 |
|* 12 | FIXED TABLE FULL | X$KZSRO | 2 | 26 | 0 (0)| 00:00:01 |
Predicate Information (identified by operation id):
2 - filter("OWNER#"=USERENV('SCHEMAID') OR EXISTS (SELECT 0 FROM SYS."X$KZSPR"
"X$KZSPR" WHERE ((-"KZSPRPRV")=(-144) OR (-"KZSPRPRV")=(-141)) AND
"INST_ID"=USERENV('INSTANCE')) OR EXISTS (SELECT 0 FROM "SYS"."OBJAUTH$"
"OBJAUTH$",SYS."X$KZSRO" "X$KZSRO" WHERE "GRANTEE#"="KZSROROL" AND "OBJ#"=:B1 AND
"PRIVILEGE#"=12))
3 - access("O"."OWNER#"="U"."USER#")
4 - access("O"."OBJ#"="A"."OBJ#")
filter(NVL("A"."PROCEDURE$","O"."NAME") LIKE :2 ESCAPE '/' AND
DECODE("A"."PROCEDURE$",NULL,NULL,"O"."NAME") LIKE :3 ESCAPE '/')
5 - filter("A"."ARGUMENT" LIKE :5 ESCAPE '/' OR "A"."ARGUMENT" IS NULL AND
DECODE("A"."TYPE#",0,NULL,1,DECODE("A"."CHARSETFORM",2,'NVARCHAR2','VARCHAR2'),2,DECO
DE("A"."SCALE",(-127),'FLOAT','NUMBER'),3,'NATIVE
INTEGER',8,'LONG',9,DECODE("A"."CHARSETFORM",2,'NCHAR
VARYING','VARCHAR'),11,'ROWID',12,'DATE',23,'RAW',24,'LONG
RAW',29,'BINARY_INTEGER',69,'ROWID',96,DECODE("A"."CHARSETFORM",2,'NCHAR','CHAR'),100
,'BINARY_FLOAT',101,'BINARY_DOUBLE',102,'REF
CURSOR',104,'UROWID',105,'MLSLABEL',106,'MLSLABEL',110,'REF',111,'REF',112,DECODE("A"
."CHARSETFORM",2,'NCLOB','CLOB'),113,'BLOB',114,'BFILE',115,'CFILE',121,'OBJECT',122,
'TABLE',123,'VARRAY',178,'TIME',179,'TIME WITH TIME
ZONE',180,'TIMESTAMP',181,'TIMESTAMP WITH TIME ZONE',231,'TIMESTAMP WITH LOCAL TIME
ZONE',182,'INTERVAL YEAR TO MONTH',183,'INTERVAL DAY TO SECOND',250,'PL/SQL
RECORD',251,'PL/SQL TABLE',252,'PL/SQL BOOLEAN','UNDEFINED') IS NOT NULL)
8 - access("U"."NAME" LIKE :1 ESCAPE '/')
filter("U"."NAME" LIKE :1 ESCAPE '/')
9 - filter(((-"KZSPRPRV")=(-144) OR (-"KZSPRPRV")=(-141)) AND
"INST_ID"=USERENV('INSTANCE'))
11 - access("OBJ#"=:B1 AND "PRIVILEGE#"=12)
filter("PRIVILEGE#"=12)
12 - filter("GRANTEE#"="KZSROROL")
52 rows selected.
Regards,
Savad