Performance tunning in select

Hi People! I need some advise!
I trying to do a performance tunnig in a program. So, I ran SE30 and the most critical time is spent in this select:
    SELECT refbt refbn rfpos rfknt
            rftrm rfart lifnr lednr
            objnr hrkft rforg rftyp rfsys
      FROM cooi
      INTO TABLE t_eban
      FOR ALL ENTRIES IN t_eban
      WHERE refbn EQ t_eban-banfn AND
                   rfpos EQ t_eban-bnfpo.
I'm already verified t_eban and it has 17 entries only. I verified t_eban to see if its is equal with selected fields and it's ok too. When I press F5 in debung in this select, this take a lot of time. How I can improve this select?
Thanks a lot for any help!

Hi,
I know you get good performance increase, nice! But I want to tell you more one thing.
I saw that some key fields in COOI table have value tables, like reftyp, RFSYS and fields that have fixed values like REFBT.
When you have this kind of problem, try to use ranges for this kind of fields, check what are the value table and do a select in that table, populate the range and use it in the select of the table you want.
Example:
TTYP is value table for reftyp.
select awtyp from TTYP
populate range r_reftyp
select fields from COOI
where reftyp in r_reftyp
and rfsys in r_refsys
To have FULL performance in a select, use FULL primary key. This is the same about of Rob´s blog
"Quickly Retrieving FI document Data from BSEG" /people/rob.burbank/blog/2007/11/12/quickly-retrieving-fi-document-data-from-bseg
Hope it be useful!
Regards.

Similar Messages

Performance tunning for select statements using likp lips and vbrp

Dear all,
I have a report where i am using select statements using first on likp the for all entries of likp i am taking data from lips and then for all entries in lips i am taking data from vbrp by matching VGBEL and VGPOS. Now the problem is that when it fetches data from vbrp it is taking lot of time around 13mins. to fetch data from vbrp. How can i overcome the problem.
regards
Amit

Hi,
there is also no secondary index for preceding document in VBFA table.
You will also have to create it here.
Regards,
Przemysław

Need help for performance tunning

Hello,
I have 16K records return by query, it takes long time to proceed for 7K it takes 7.5 sec.
Note: I used all seeded tables only.
If possible please help me to tune it.
SELECT msi.inventory_item_id,msi.segment1,msi.rimary_uom_code , msi.primary_unit_of_measure
FROM mtl_system_items_b msi, qp_list_lines qpll,qp_pricing_attributes qppr,
 mtl_category_sets_tl mcs,mtl_category_sets_b mcsb,
 mtl_categories_b mc, mtl_item_categories mcb
WHERE msi.enabled_flag = 'Y'
 AND qpll.list_line_id = qppr.list_line_id
 AND qppr.product_attr_value = TO_CHAR (msi.inventory_item_id(+))
 AND qppr.product_uom_code = msi.primary_uom_code
 AND mc.category_id = mcb.category_id
 AND msi.inventory_item_id = mcb.inventory_item_id
 AND msi.organization_id = mcb.organization_id
 AND TRUNC (SYSDATE) BETWEEN NVL (qpll.start_date_active,TRUNC (SYSDATE)) AND NVL (qpll.end_date_active,TRUNC (SYSDATE))
 AND mcs.category_set_name = 'LSS SALES CATEGORY'
 AND mcs.language = 'US'
 AND mcs.category_set_id = mcsb.category_set_id
 AND mcsb.structure_id = mc.structure_id
 AND msi.organization_id = :p_organization_id
 AND qpll.list_header_id = :p_price_list_id
 AND mcb.category_id = :p_category_id;
Thanks and regards
Akil.

Thanks Helios ,
here is answers
Databse version
Oracle Database 11g Enterprise Edition Release 11.1.0.7.0 - 64bit
PL/SQL Release 11.1.0.7.0
explain plan
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)|
|
0 | SELECT STATEMENT
| |
1 | 149 | 9439
(1)|
|
1 | NESTED LOOPS | | 1 |
149 | 9439 (1)|
|*
2 | HASH JOIN OUTER | | 1 |
135 | 9437 (1)|
|*
3 | HASH JOIN | | 1 |
71 | 9432 (1)|
|
4 | NESTED LOOPS | | 2 |
76 | 53 (0)|
|*
5 | TABLE ACCESS BY INDEX
ROWID| QP_LIST_LINES | 2 |
44 | 49 (0)|
|*
6 | INDEX SKIP SCAN | QP_LIST_LINES_N2 |
702 | | 20
(0)|
|*
7 | INDEX RANGE SCAN | QP_PRICING_ATTRIBUTES_N3 | 1 |
16 | 2 (0)|
|*
8 | TABLE ACCESS BY INDEX
ROWID | MTL_SYSTEM_ITEMS_B | 46254
| 1490K|
9378 (1)|
|*
9 | INDEX RANGE SCAN | MTL_SYSTEM_ITEMS_B_N9 | 46254 | |
174 (1)|
|
10 | TABLE ACCESS FULL | XX_WEB_ITEM_IMAGE_TBL |
277 | 17728 | 5 (0)|
|* 11 | INDEX RANGE SCAN | MTL_ITEM_CATEGORIES_U1 |
1 | 14 | 2
(0)|
Predicate Information (identified
by operation id):
2 -
access("XWIIT"."IMAGE_CODE"(+)="MSI"."SEGMENT1")
3 -
access("QPPR"."PRODUCT_ATTR_VALUE"=TO_CHAR("MSI"."INVENTORY_ITEM_ID")
AND
"QPPR"."PRODUCT_UOM_CODE"="MSI"."PRIMARY_UOM_CODE")
5 - filter(NVL("QPLL"."START_DATE_ACTIVE",TRUNC(SYSDATE@!))<=TRUNC(SYSDATE@!)
AND
NVL("QPLL"."END_DATE_ACTIVE",TRUNC(SYSDATE@!))>=TRUNC(SYSDATE@!))
6 -
access("QPLL"."LIST_HEADER_ID"=TO_NUMBER(:P_PRICE_LIST_ID))
filter("QPLL"."LIST_HEADER_ID"=TO_NUMBER(:P_PRICE_LIST_ID))
7 -
access("QPLL"."LIST_LINE_ID"="QPPR"."LIST_LINE_ID")
filter("QPPR"."PRODUCT_UOM_CODE" IS NOT NULL)
8 - filter("MSI"."ENABLED_FLAG"='Y')
9 - access("MSI"."ORGANIZATION_ID"=TO_NUMBER(:P_ORGANIZATION_ID))
11 -
access("MCB"."ORGANIZATION_ID"=TO_NUMBER(:P_ORGANIZATION_ID)
AND
"MSI"."INVENTORY_ITEM_ID"="MCB"."INVENTORY_ITEM_ID"
AND
"MCB"."CATEGORY_ID"=TO_NUMBER(:P_CATEGORY_ID))
 filter("MCB"."CATEGORY_ID"=TO_NUMBER(:P_CATEGORY_ID))
Note
- 'PLAN_TABLE' is old version
TKprof Plan
TKPROF: Release 11.1.0.7.0 - Production on Fri Nov 15 06:12:26 2013
Copyright (c) 1982, 2007, Oracle. All rights reserved.
Trace file: LSSD_ora_19760.trc
Sort options: default
count = number of times OCI procedure was executed
cpu = cpu time in seconds executing
elapsed = elapsed time in seconds executing
disk = number of physical reads of buffers from disk
query = number of buffers gotten for consistent read
current = number of buffers gotten in current mode (usually for update)
rows = number of rows processed by the fetch or execute call
SELECT msi.inventory_item_id,
 msi.segment1,
 primary_uom_code,
 primary_unit_of_measure,
 xwiit.image_url
FROM mtl_system_items_b msi,
 qp_list_lines qpll,
 qp_pricing_attributes qppr,
 mtl_item_categories mcb,
 xx_web_item_image_tbl xwiit
WHERE msi.enabled_flag = 'Y'
 AND qpll.list_line_id = qppr.list_line_id
 AND qppr.product_attr_value = TO_CHAR (msi.inventory_item_id)
 AND qppr.product_uom_code = msi.primary_uom_code
 AND msi.inventory_item_id = mcb.inventory_item_id
 AND msi.organization_id = mcb.organization_id
 AND TRUNC (SYSDATE) BETWEEN NVL (qpll.start_date_active,
 TRUNC (SYSDATE))
 AND NVL (qpll.end_date_active,
 TRUNC (SYSDATE))
 AND xwiit.image_code(+) = msi.segment1
 AND msi.organization_id = :p_organization_id
 AND qpll.list_header_id = :p_price_list_id
 AND mcb.category_id = :p_category_id
call count cpu elapsed disk query current rows
Parse 2 0.00 0.00 0 0 0 0
Execute 2 0.00 0.00 0 0 0 0
Fetch 2 3.84 3.85 0 432560 0 1002
total 6 3.84 3.85 0 432560 0 1002
Misses in library cache during parse: 0
Optimizer mode: ALL_ROWS
Parsing user id: 173
Rows Row Source Operation
 501 NESTED LOOPS (cr=216280 pr=0 pw=0 time=115 us cost=9439 size=149 card=1)
 2616 HASH JOIN OUTER (cr=211012 pr=0 pw=0 time=39 us cost=9437 size=135 card=1)
78568 HASH JOIN (cr=210997 pr=0 pw=0 time=3786 us cost=9432 size=71 card=1)
78571 NESTED LOOPS (cr=29229 pr=0 pw=0 time=35533 us cost=53 size=76 card=2)
78571 TABLE ACCESS BY INDEX ROWID QP_LIST_LINES (cr=9943 pr=0 pw=0 time=27533 us cost=49 size=44 card=2)
226733 INDEX SKIP SCAN QP_LIST_LINES_N2 (cr=865 pr=0 pw=0 time=4122 us cost=20 size=0 card=702)(object id 99730)
78571 INDEX RANGE SCAN QP_PRICING_ATTRIBUTES_N3 (cr=19286 pr=0 pw=0 time=0 us cost=2 size=16 card=1)(object id 99733)
128857 TABLE ACCESS BY INDEX ROWID MTL_SYSTEM_ITEMS_B (cr=181768 pr=0 pw=0 time=9580 us cost=9378 size=1526382 card=46254)
128857 INDEX RANGE SCAN MTL_SYSTEM_ITEMS_B_N9 (cr=450 pr=0 pw=0 time=1657 us cost=174 size=0 card=46254)(object id 199728)
 277 TABLE ACCESS FULL XX_WEB_ITEM_IMAGE_TBL (cr=15 pr=0 pw=0 time=22 us cost=5 size=17728 card=277)
 501 INDEX RANGE SCAN MTL_ITEM_CATEGORIES_U1 (cr=5268 pr=0 pw=0 time=0 us cost=2 size=14 card=1)(object id 99557)
Note: I modified query and it gives good result, now it takes 3 to 4 sec for 16000 records.
If possible can you plz explain what we have to take care while doing performance tunning
I am a fresher so don't have that much idea.
and also Thanks Hussein for your replay

Tools in Performance Tunning

What are the tools in performance Tunning in ABAP/4
Thanks Regards,
Kumar

Hi kumar,
Tools provided for Performance Analysis
Following are the different tools provided by SAP for performance analysis of an ABAP object
Run time analysis transaction SE30
This transaction gives all the analysis of an ABAP program with respect to the database and the non-database processing.
SQL Trace transaction ST05
The trace list has many lines that are not related to the SELECT statement in the ABAP program. This is because the execution of any ABAP program requires additional administrative SQL calls. To restrict the list output, use the filter introducing the trace list.
The trace list contains different SQL statements simultaneously related to the one SELECT statement in the ABAP program. This is because the R/3 Database Interface - a sophisticated component of the R/3 Application Server - maps every Open SQL statement to one or a series of physical database calls and brings it to execution. This mapping, crucial to R/3s performance, depends on the particular call and database system. For example, the SELECT-ENDSELECT loop on the SPFLI table in our test program is mapped to a sequence PREPARE-OPEN-FETCH of physical calls in an Oracle environment.
The WHERE clause in the trace list's SQL statement is different from the WHERE clause in the ABAP statement. This is because in an R/3 system, a client is a self-contained unit with separate master records and its own set of table data (in commercial, organizational, and technical terms). With ABAP, every Open SQL statement automatically executes within the correct client environment. For this reason, a condition with the actual client code is added to every WHERE clause if a client field is a component of the searched table.
To see a statement's execution plan, just position the cursor on the PREPARE statement and choose Explain SQL. A detailed explanation of the execution plan depends on the database system in use.
how to perform sql trace:
Poorly written SQL statements have the greatest impact on application performance. An SQL
statement using which an Oracle database system reads and/or sorts thousands or even millions of
rows of data can bring the database to a standstill. Indexes should be used properly to prevent such
situations from occurring. To analyze such problems you should use the SQL Trace (TCode ST05) to
with database access operations.
CAUTION
Only one person can perform an SQL trace at a time. Remember to turn off the
trace when you are finished. SQL trace slows the system down.
1. Using SQL Trace
1. Open a program that you want to analyze, in the editor, so that it is ready and waiting to be
executed.
2. Open a new session using the menu path System   Create session.
3. Run transaction ST05 (enter /nst05-zero-five, not oh-five in the Command field, or choose
the menu path System Utilities Performance Trace).
4. Then the initial screen of the test tool appears.
The status of the Performance Trace is displayed in the lower part of the screen. This status tells you
three things namely
Whether any of the Performance Traces are switched on
The users for whom Performance Trace is enabled
The user that switched the Performance Trace on
If the trace is switched on you must switch it off before you can proceed. There are two cases in
which the trace needs to be switched off. They are
If the trace was started within the past hour, it is possible that it is still being used. Contact the
indicated user or try again later
If the trace was started hours or days ago, the user probably left it on by mistake and it can be
safely turned off
To turn off the trace, press the Trace Off pushbutton.
5. The initial screen has various trace functions such as SQL Trace, Enqueue Trace, RFC
Trace
6. Select SQL Trace.
7. There are various options under which trace can be switched on. They are
If you want to switch on the trace under your user name, choose Trace on.
If you want to switch on the trace for another user or user group, choose Trace on for user.
To enter a single user, specify the user name.
To enter a user group, specify a search pattern (you can use the normal wildcards).
If you want to change the user or user group, switch off the Performance Trace and then restart it,
entering the new users or user group.
8. Now switch back to the window containing your editor session (the one with your program
waiting to be executed).
9. Press F8 to run your program.
Note Just press F8 and do nothing. Do not even press the Back button.
10. When your program has run and the hourglass is no longer displayed, switch back to the trace
window.
11. Press the Trace Off pushbutton.
12. Once Performance Trace is switched off, you can analyze the data
Using Runtime Analysis Tool (SE30)
1. You can open the Runtime Analysis tool as follows:
To start from Choose
Any screen System   Utilities   Runtime Analysis   Execute
Initial screen of ABAP
Workbench
Test   Runtime Analysis
Initial screen of ABAP Editor Program   Execute Runtime Analysis
ABAP Editor Utilities   More utilities   Runtime Analysis
2. In the simplest case, you would enter a short description and a measurement object
(transaction, program, or function module) to run the analysis in the current session.
3. In the Measurement restrictions group box, you can make more specific restrictions for the
measurement. For example, you may want to include only certain statements or time periods.
(For further information refer section 3. 0).
4. To start the measurement, choose Measure runtime. From the initial screen, you can
specify whether the analysis should run in the same session or in a parallel session using the
Enable/Disable button in the In parallel session group box.
5. Run the transaction, program, or function module as normal.
6. Return to the initial screen of the Runtime Analysis transaction. To do so, either leave
transaction, program, or function module as normal, or start the runtime analysis again.
7. The name of the performance data file that has just been created is displayed at the bottom of
the initial screen. The file created by the system is added to the list of performance data files.
You can now analyze, print, or delete the file, or save it locally. The Performance file group
box contains options for analyzing performance files. (For further information refer sections 4.
0 and 5. 0)
regards,
keerthi

How to do performance tunning

Hi,
Can any one help me how to do performance tunning.I was given two scripts which contains more UNION clauses.

Hi,
What version of Oracle are you on? If you have Oracle 22S (the S is for "Sentient"), there's one way:
SCOTT@ORA22S> set autotrace traceonly explain
SCOTT@ORA22S> ed
Wrote file afiedt.buf
1 select *
2 from test
3* where test_date > date '2001-01-01'
SCOTT@ORA22S> /
Execution Plan
0    SELECT STATEMENT Optimizer=ALL_ROWS (Cost=40656 Card=1071132 Bytes=163883196)
1 0   TABLE ACCESS (BY INDEX ROWID) OF 'TEST' (TABLE) (Cost=40656 Card=1071132 Bytes=163883196)
2 1     INDEX (FULL SCAN) OF 'TST_CUSTOM_03' (INDEX) (Cost=6785 Card=1071132)
SCOTT@ORA22S> alter session set sql_go_fast = true;
Session altered.
SCOTT@ORA22S> /
Execution Plan
0    SELECT STATEMENT Optimizer=ALL_ROWS (Cost=9979 Card=1071132 Bytes=163883196)
1 0   TABLE ACCESS (FULL) OF 'TEST' (TABLE) (Cost=9979 Card=1071132 Bytes=163883196)Unfortunately Oracle 22S may not be available for a while. Until then you may have to listen to Billy ;-)
cheers,
Anthony

Could any body suggest hoe to tune this SELECT stmt?

DATA : BEGIN OF it_bkpf OCCURS 100,
 bukrs LIKE bkpf-bukrs,
 belnr LIKE bkpf-belnr,
 gjahr LIKE bkpf-gjahr,
 blart LIKE bkpf-blart,
 budat LIKE bkpf-budat,
 usnam LIKE bkpf-usnam,
 dbblg LIKE bkpf-dbblg,
 stblg LIKE bkpf-stblg,
 stjah LIKE bkpf-stjah,
 bktxt LIKE bkpf-bktxt,
 grpid LIKE bkpf-grpid,
 awkey LIKE bkpf-awkey,
 tcode LIKE bkpf-tcode,
 END OF it_bkpf.
 SELECT bukrs belnr gjahr blart budat usnam dbblg stblg stjah
 bktxt grpid awkey tcode
 INTO TABLE it_bkpf
 FROM bkpf
 WHERE bukrs IN s_bukrs AND
 budat IN postdate AND
 blart IN s_blart AND
 blart in s_blart1 and
 usnam IN s_usnam
 %_HINTS ORACLE 'INDEX(BKPF BKPF______Z1)'.
Could you please suggest what is wrong or how to tune this SELECT stmt?

hi,
 for increasing perfomance of the select statement , check u r using the Proper Index of the table( table contains primary index and secondary index).
once u also check, u provide the low and high values to s_bukrs , s_blart , s_usnam all these fields( if u define using select-options statement) otherwise it will check from its low value to final value.
 Keep the selected data amount be small.
for furthur refarence u follow these links.
http://www.sapbrain.com/ARTICLES/TECHNICAL/optimization/optimization.html
https://www.sdn.sap.com/irj/sdn/wiki?path=/display/abap/abapPerformanceand+Tuning&
http://www.sap-img.com/abap/performance-tuning-for-data-selection-statement.htm
regards,
AshokReddy.

Performance issue when selection LIPS table into program.

Hi expert,
I have created Pending sales order report , in that i am facing performance problem for selection of LIPS table.
i have tried to use VLPMA table but performance has not been improved so, is their any need to create secondary index and
if yes then which fields of lips table i have to includes in index.
Please reply.
Regards,
Jyotsna

>
UmaDave wrote:
> Hi ,
> 1.Please make use of PACKAGE in your select query , it will definetly improve the performance.
> 2.Please use the primary index by passing the fields in where clause in the order in which they appera in LIPS table.
> 3.You can also create a secondary index with the fields which you are using in where clause of select query and maintain the fields in the same sequence (where clause and secondary index)
> 4.If there is any inner joins (more than 3) then reduce them and have few mare select queries for them and make use of for all entries.
>
> This will definitely improve the performance to great extend.
>
> Hope this is helpful.
> Regards,
> Uma
Please do some more research before offering advice:
PACKAGE SIZE is for memory management, not performance.
Creating a secondary index is using a hammer to swat a fly and the order in the SELECT is not relevant.
FAE does not improve performance over a JOIN.
Rob

How to Improve the performance in Variable Selection Screen.

Hi,
In Query Level we have Variable " User entry Defalt Valu". User want select particular value when he press "F4" it's take hours time how to improve the performance in Varaible Selection Screen.
Thanks in Advance.
Regards,
Venkat.

Dear Venkat.
You please try the following steps:
1. Say the InfoObject is 0EMPLOYEE against which you have created the variable, which user is trying to select value against, when they execute the report.
2. Goto RSA1-> InfoObject tab-> Select InfoObject 0EMPLOYEE.
3. Selcet the following options:
Query Execution Filter Val. Selectn - 'Only Posted Value for Navigation'
Filter Value Repr. At Query Exec. - 'Selector Box Without Values'
Please let me know if there is any more issue. Feel free to raise further concern
Thnx,
Sukdev K

Performance tunning in oracle

Hi friends,
I am himansu, i am facing a problem during performance tunning of query in oracle , please guide me how to tune a query which will give better performance.

907977 wrote:
Hi friends,
I am himansu, i am facing a problem during performance tunning of query in oracle , please guide me how to tune a query which will give better performance.Welcome to OTN
Please post your thread at SQL, PL/SQL. PL/SQL
and provide your sql query.
Hope this will help you.

Performance problem with selecting records from BSEG and KONV

Hi,
I am having performance problem while selecting records from BSEG and KONV table. As these two tables have large amount of data , they are taking lot of time . Can anyone help me in improving the performance . Thanks in advance .
Regards,
Prashant

Hi,
Some steps to improve performance
SOME STEPS USED TO IMPROVE UR PERFORMANCE:
1. Avoid using SELECT...ENDSELECT... construct and use SELECT ... INTO TABLE.
2. Use WHERE clause in your SELECT statement to restrict the volume of data retrieved.
3. Design your Query to Use as much index fields as possible from left to right in your WHERE statement
4. Use FOR ALL ENTRIES in your SELECT statement to retrieve the matching records at one shot.
5. Avoid using nested SELECT statement SELECT within LOOPs.
6. Avoid using INTO CORRESPONDING FIELDS OF TABLE. Instead use INTO TABLE.
7. Avoid using SELECT * and Select only the required fields from the table.
8. Avoid nested loops when working with large internal tables.
9. Use assign instead of into in LOOPs for table types with large work areas
10. When in doubt call transaction SE30 and use the examples and check your code
11. Whenever using READ TABLE use BINARY SEARCH addition to speed up the search. Be sure to sort the internal table before binary search. This is a general thumb rule but typically if you are sure that the data in internal table is less than 200 entries you need not do SORT and use BINARY SEARCH since this is an overhead in performance.
12. Use "CHECK" instead of IF/ENDIF whenever possible.
13. Use "CASE" instead of IF/ENDIF whenever possible.
14. Use "MOVE" with individual variable/field moves instead of "MOVE-
CORRESPONDING" creates more coding but is more effcient.

Performance tunning in exraction.

hii frnds,
can anyone plz tell me the performance tunning in extraction,in report,in dataloading.plz reply me in pointwise..
Thanks
Rosy
Please search for available information before posting.
Edited by: kishan P on Jan 24, 2012 10:57 AM

Hi Rosy,
Please check the below docs,
http://www.tli-usa.com/download/Expert_Tips_and_New_Techniques_for_Optimizing_Data_Load_and_Query_Performance__Part_One_.pdf
http://www.tli-usa.com/download/Expert_Tips_and_New_Techniques_for_Optimizing_Data_Load_and_Query_Performance__Part_Two_.pdf
http://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/08f1b622-0c01-0010-618c-cb41e12c72be?QuickLink=index&overridelayout=true
Thanks,
Vinod

Performance Tunning in weblogic

Hi All,
Can you please tell me about performance tunning in weblogic server in simple way to understand. I have gone through Pdf's but some what difficult to understand .
Thanks
Balaji kumar

the only serious approach to performance tuning is:
- write scripts who geneerate load on your system
- profile your system under load using a profiler such as yourkit or jrockit mission control
- monitor your application (ejb pools, datasources, jvm, threads9 under load to detect any bottleneck
- analyze logs under load to determine any saturation in resource usage
most default parameters of weblogic are already optimized for general purpose usage.
but every application if different from the other, so you must do your own homework

Unknown steps in performance tunning

Hi,
I am in middle of performance tunning in BI 7.0, as i am going to do the following steps-i am unclear in some steps;
expert advice is needed. post ur ans as soon as possible.
When loading transaction data, following this procedure:
known - Load all master data.
known - Delete the indices of the InfoCube and its aggregates.
Unknown - Turn on number range buffering.
Unknown - Set an appropriate data packet size.
known - Load the transaction data.
known - Re-create the indices.
Unknown - Turn off number range buffering.
known - Refresh the statistics.
regards,
Suman

Hi Suman,
check these on number range buffering
http://help.sap.com/saphelp_nw04/helpdata/en/7b/6eb2aa7aed44ea92ebb969e03081fb/frameset.htm
http://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/c0a6e3ff-f000-2d10-b59d-8ef35e248f83?quicklink=index&overridelayout=true

Performance tunning

Dear Experts,
I am urgently looking forward to some comprehensive documentation on Performance tunning elaborating on the issues like:-
1.)In what instances should we do performance tunning....
2.) why it is neccessary and
3.) what r the various methods of performance tunnig....
I shall be highly obliged, if anyone can point me to relevant links, or send me illustrative documentation on these issues in performance tunning at [email protected]
ur help shall be thankfully/duely acknowledged,
regards,
shalini.
Message was edited by: shalini gupta

Shalini ,
Performance tuning is at various levels :
1. Data Modeling
2. Data Loading
3. Report design
4. Reporting
It is a mix and match of the above and other factors you might need to consider could also be something like:
1. DB being used
2. Partitioning
3. System parameters
4. Authorization Design...
All this depends on the level of performance tuning you want to do:
https://websmp204.sap-ag.de/~sapidb/011000358700001890502003
This is a link to the support portal and I have sent the same across to you. Hope it is useful.
Arun

How to improve my pls/sql performance tunning skills

Hi All , I would like to learn more about pl/sql performance tunning , where or how can i get more knowledge in this area ?
Is there any tutorials which can help me to understand the Explain plan, Dbms_Profiler, Dbms_Advisor more etc ........Thanks . Bcj

Explain plan
http://www.psoug.org/reference/explain_plan.html
DBMS_PROFILER (10g)
http://www.psoug.org/reference/dbms_profiler.html
DBMS_HPROF (11g)
http://www.psoug.org/reference/dbms_hprof.html
DBMS_ADVISOR
http://www.psoug.org/reference/dbms_advisor.html
DBMS_MONITOR
http://www.psoug.org/reference/dbms_monitor.html
DBMS_SUPPORT
http://www.psoug.org/reference/dbms_support.html
DBMS_TRACE
http://www.psoug.org/reference/dbms_trace.html
DBMS_SQLTUNE
http://www.psoug.org/reference/dbms_sqltune.html

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