Regarding query to be tunedd in database

how can i find in my database that which are the queries that needed ...which output of awr shows that..
i need to find in general that what are all the queries that are taking much time,resources and needed to be tuned

Hello,
The queries execution time vary according to many metrics.those metrics are:
1) Logical IO's per execution?
2) Cpu usage?
3) Physical IO's per execution?
4) Elapsed time used?
5) Based on number of parse calls?
6) Size consumed in shared pool?
7) Number of executions?
8) Based on Wait time?In your case i will start by queries that take much time and start generating plan for those queries to know where the cost of those queries are consumed.If you are using the Enterprise manager it will be also helpful to check to activity in the performance tab to have indication where the top activity is going.
Regards
Mohamed ELAzab
http://mohamedelazab.blogspot.com/

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Syam,
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Since a month, almost every week this query starts going VERY slow. Usually it executes in a 0.5-1 second, but when it's slowed down, it takes approx. 4-5 minutes to execute.
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- Made sure that the server is not under heavy load (antiviruses, firewalls, archive loggers are stopped or uninstalled for a while).
- made sure that there is enough free space on hard disks.
- the disk array itself is in good health - defragmented, HDD tools doesn't find anything suspicious.
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Screenshots showing the explain plans for slow and fast query:
Image: !http://img254.imageshack.us/img254/6674/queryr.jpg!

Sorry for the incomplete information. I tried to gather the mentioned in your second link additional data. Unfortunately, I cannot find the TKPROF utility - it's not in the bin directory, neither in any other folder. Guess it's not installed at all.
About rewriting the query, suggested in the first link you gave: it's so simple and clear that it should not be rewriten. As I mentioned before, every time I change the query even a little bit, it starts running well for a couple of days.
Anyway, here are the stats I've just gathered. Unfortunately, now the query performs well and I'm not able to give you stats, showing the slowed down query.
These are the parameters relevant to the optimizer:
SQL> show parameter optimizer
NAME TYPE VALUE
optimizer_dynamic_sampling integer 2
optimizer_features_enable string 10.1.0.4
optimizer_index_caching integer 0
optimizer_index_cost_adj integer 100
optimizer_mode string ALL_ROWS
SQL> show parameter db_file_multi
NAME TYPE VALUE
db_file_multiblock_read_count integer 32
SQL> show parameter db_block_size
NAME TYPE VALUE
db_block_size integer 8192
SQL> show parameter cursor_sharing
NAME TYPE VALUE
cursor_sharing string EXACT
Screenshots of explain plan is posted in my first post - both for fast and slow executed query.
output of SQL_Plus AUTOTRACE including the TIMING information:
SQL> set autotrace traceonly arraysize 1000
SQL> SELECT * FROM "AOPERITEM"
WHERE (FOPER = 201)
AND (FCLIENT = 1)
AND (FDATEOPER = '2009-10-28')
AND (FNUMOPER = 95532)
Execution Plan
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)|
| 0 | SELECT STATEMENT | | 1 | 132 | 5 (0)|
| 1 | TABLE ACCESS BY INDEX ROWID| AOPERITEM | 1 | 132 | 5 (0)|
| 2 | INDEX RANGE SCAN | AOPERITEM_IDX | 1 | | 4 (0)|
Note
- 'PLAN_TABLE' is old version
Statistics
1 recursive calls
0 db block gets
9 consistent gets
0 physical reads
0 redo size
3098 bytes sent via SQL*Net to client
369 bytes received via SQL*Net from client
2 SQL*Net roundtrips to/from client
0 sorts (memory)
0 sorts (disk)
4 rows processed
The DBMS_XPLAN.DISPLAY_CURSOR output:
SQL> select /*+ gather_plan_statistics */
* FROM "AOPERITEM"
WHERE (FOPER = 201)
AND (FCLIENT = 1)
AND (FDATEOPER = '2009-10-28')
AND (FNUMOPER = 95532)
Execution Plan
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)|
| 0 | SELECT STATEMENT | | 1 | 132 | 5 (0)|
| 1 | TABLE ACCESS BY INDEX ROWID| AOPERITEM | 1 | 132 | 5 (0)|
| 2 | INDEX RANGE SCAN | AOPERITEM_IDX | 1 | | 4 (0)|
Note
- 'PLAN_TABLE' is old version
Statistics
0 recursive calls
0 db block gets
9 consistent gets
4 physical reads
0 redo size
2937 bytes sent via SQL*Net to client
369 bytes received via SQL*Net from client
2 SQL*Net roundtrips to/from client
0 sorts (memory)
0 sorts (disk)
4 rows processed
PS: I'm not a DBA myself, I'm just trying to find a solution to this problem.
Thanks in advance.

Regarding query to be tunedd in database

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