Performance Tunning - Oracle Reports 6i

Hi Gurus,
I have an Oracle Apps Reports 6i with a formula column having so much of conditions making the reports to take long time to get completed. Its taking 20 mins to complete. Please your help on this.
Thanks,
Genoo

Hi
what is your database version?
what is your table size ?
How many RAM do you have in this server?
However, in Reports, the default optimizer mode is ALL_ROWS, this optimizer mode let you have the best system through put.
In SQL*Plus, you have to set the optimizer mode to ALL_ROWS to tune the report SQL performance:
Issue
ALTER SESSION SET OPTIMIZER_MODE=ALL_ROWS;
or add an optimizer hint in the SQL statement
Select /*+ ALL_ROWS */
from ....

Similar Messages

Performance Tunning in report

Dear All,
we have one report. if i run the report then it will take 2 to 4 hrs.
I have checked main query & formula columns, all the query reading the index.
How can i Tune this report & how can reduce the running time.
Pls help me.

Wrong forum, betters ask in the SQL-forum.
Apart from that: have a look at the explain-plan and check the cost of your select-statement. If you are using the cost-based optimizer and have a very low cost for the statement but the time it takes to complete is very high, you may have to regather the table statistics. Wrong or old table statistics can create problems for even higly optimized select-statements.
Regards
Markus

Performance Issue Crystal Report and Oracle

Hello,
We have one procedure that takes 3 input parameters and returns Cursor from Procedure that is used to design the report. There is no caluculation involved here and cursor is opended dynamically. We are using Oracle Native connection.
When we click on preview button it takes lots of time ( >10 Mins) to show complete data. While we call the same procedure in application and generate HTML report using Cursor returned it is done in < 15 Seconds. Can some point me where to look into to improve the performance of Crystal Report.
DB: Oracle 10G
CR: Version XI

Hi Vadiraja
The performance of a report is related to:
External factors:
1. The amount of time the database server takes to process the SQL query.
( Crystal Reports send the SQL query to the database, the database process it, and returns the data set to Crystal Reports. )
2. Network traffics.
3. Local computer processor speed.
( When Crystal Reports receives the data set, it generates a temp file to further filter the data when necessary, as well as to group, sort, process formulas, ... )
4. The number of record returned
( If a sql query returns a large number of records, it will take longer to format and display than if was returning a smaller data set.)
Report design:
1. Where is the Record Selection evaluated.
Ensure your Record Selection Formula can be translated in SQL, so the data can be filter down on the server, otherwise the filtering will be done in a temp file on the local machine which will be much slower.
They have many functions that cannot be translated in SQL because they may not have a standard SQL for it.
For example, control structure like IF THEN ELSE cannot be translated into SQL. It will always be evaluated in Crystal Reports. But if you use an IF THEN ELSE on a parameter, it will convert the result of the condition to SQL, but as soon as uses database fileds in the conditions it will not be translated in SQL.
2. How many subreports the report contains and in section section they are located.
Minimise the number of subreports used, or avoid using subreports if possible because
subreports are reports within a report, and if you have a subreport in a details section, and the report returns 100 records, the subreport will be evaluated 100 times, so it will query the database 100 times. It is often the biggest factor why a report takes a long time to preview.
3. How many records will be returned to the report.
Large number of records will slow down the preview of the reports.
Ensure you only returns the necessary data on the report, by creating a Record Selection Formula, or basing your report off a Stored Procedure, or a Command Object that only returns the desired data set.
4. Do you use the special field "Page N of M", or "TotalPageCount"
When the special field "Page N of M" or "TotalPageCount" is used on a report, it will have to generate each page of the report before it displays the first page, therfore it will take more time to display the first page of the report.
If you want to improve the speed of a report, remove the special field "Page N of M" or "Total Page Count" or formula that uses the function "TotalPageCount". If those aren't use when you view a report it only format the page requested.
It won't format the whole report.
5. Link tables on indexed fields whenever possible.
6. Remove unused tables, unused formulas, unused running totals from the report.
7. Suppress unnecessary sections.
8. For summaries, use conditional formulas instead of running totals when possible.
9. Whenever possible, limit records through selection, not suppression.
10. Use SQL expressions to convert fields to be used in record selection instead of using formula functions.
For example, if you need to concatenate 2 fields together, instead of doing it in a formula, you can create a SQL Expression Field. It will concatenate the fields on the database server, instead of doing in Crystal Reports. SQL Expression Fields are added to the SELECT clause of the SQL Query send to the database.
11. Using one command as the datasource can be faster if you returns only the desired data set.
It can be faster if the SQL query written only return the desired data.
12. Perform grouping on server
This is only relevant if you only need to return the summary to your report but not the details. It will be faster as less data will be returned to the reports.
Regards
Girish Bhosale

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.

Oracle apps performance tunning

Hey
could u any one tell me where i will get the Oracle Apps Performance
Tunning on Module wise like OM/AP/AR.
how to verify that my oracle Apps[11.5.10] instance running fine on linux based !!
i need check list Oracle Apps Performance !!

best would be to start with http://docs.oracle.com/cd/E11882_01/server.112/e16638/toc.htm
Regards
Karan

Oracle 11g Performance tunning

Hi Guru's
I am new to Performance tunning, can u please guide me from where to start performance tuning so that i study and do the practical as well.
I know how to run AWR and ADDM but i want to konw what are the sequence i follow to learn and do performance tunning.
Thanks in advance

best would be to start with http://docs.oracle.com/cd/E11882_01/server.112/e16638/toc.htm
Regards
Karan

Perfomance of oracle report

Hi,
I am working on a oracle report. the report performance is very slow.
Based on the requirement i have designed my data model in such a way that
i used many formula columns & summary columns...
Can some let me know how to tune the report. and increase its performance...
Plz let me know if you guys need any more details.
thnkq

Hi,
Formula columns are like subprogram, being called at the run time of the main query. They always degrade the report performance.
following link shows the various ways to tune reports in detail:
http://oracleapps4u.blogspot.com/2011/03/tuning-oracle-reports-6i-i.html
http://oracleapps4u.blogspot.com/2011/03/tuning-oracle-reports-6i-ii.html
Regards
Edited by: 843698 on Mar 15, 2011 4:32 PM
Edited by: 843698 on Mar 15, 2011 4:33 PM

How to do Performance tunning in OBIEE

Hi All,
We are using OBIEE 10.3.4 version on windows envorinment .In our OBIEE project we are using 9 reports my requriment is we need to do performance tunning for OBIEE side.For eace report accessing its taking around 80 sec.We need to decrease these accessing time,is there any possibility to access all the reports with less response time in OBIEE side.
Could you anyone suggest how to do performance tunning in OBIEE side.
Thanks,
Vijay.

Vijay,
Plz refer
http://www.business-intelligence-quotient.com/?p=119
http://prolynxuk.com/blog/?p=173
http://businessdecisionsystems.com/blog/?p=486
Here is the section from the BIEE admin guide:
=======================
Usage Examples
This section provides a few examples of how to use Oracle hints in conjunction with the Oracle BI Server. For more information about Oracle hints, refer to the Oracle SQL Reference documentation for the version of the Oracle server that you use.
Index Hint
The Index hint instructs the optimizer to scan a specified index rather than a table. The following hypothetical example explains how you would use the Index hint. You find queries against the ORDER_ITEMS table to be slow. You review the query optimizer's execution plan and find the FAST_INDEX index is not being used. You create an Index hint to force the optimizer to scan the FAST_INDEX index rather than the ORDER_ITEMS table. The syntax for the Index hint is index(table_name, index_name). To add this hint to the repository, navigate to the Administration Tool's Physical Table dialog box and type the following text in the Hint field:
index(ORDER_ITEMS, FAST_INDEX)
Leading Hint
The Leading hint forces the optimizer to build the join order of a query with a specified table. The syntax for the Leading hint is leading(table_name). If you were creating a foreign key join between the Products table and the Sales Fact table and wanted to force the optimizer to begin the join with the Products table, you would navigate to the Administration Tool's Physical Foreign Key dialog box and type the following text in the Hint field:
leading(Products)
So, the table names "order_items" and "products" in the above documentation will not be the same after BIEE puts aliases on them.
============
Hope this is useful..
Edited by: Deepak Gupta on Aug 1, 2011 7:18 AM

How to improve performance of Oracle Forms Server ?

Recently we converted our Application which was Developed in Forms 5.0 and Reports 3.0 into Forms6i to host that on to Web. We also loaded ORACLE 9iAS (on Windows NT 4 with service pack 3) from "Enterprise Edition" option by selecting Oracle Database Cache, Forms Server and Reports Server, HTTP Server(on port 80),Oracle Web Cache. Everything loaded succesfully including Caches.
Forms server is working perfectly and we were able to run our Application in Browser, but performance is the issue. We thought the caches will improve the performance, but it seems they are not at all working. When we run a report or form the Database cache is not giving any statistics whether a particular Query is a Hit or Miss though the cache is running. We got a doubt and searched in FAQ's and we found the following questions.
Oracle9iAS Web Cache Frequently Asked
Questions February 2001
Does Oracle9iAS Web Cache work with applications that use Oracle9iAS Forms?
Not in the 1.x release of Oracle9iAS. Integration between Oracle9iAS Web Cache and Oracle9iAS Forms will be addressed at a future date.
Oracle9iAS Database Cache
Does the Cache work with Oracle Forms and Portal in Oracle9i AS?
Since Oracle Forms and Portal utilize read/write PL/SQL stored procedures, these components cannot take advantage of the Cache. This support is being considered for a future version.
After coming to know that Caches doesnot boost the performance of Oracle Forms and reports. We have the following queries.
1) Clarify whether the above are True.
2) Apart from DB and Web Cache is there any other way where in we can improve the performance of Oracle Forms and Reports in Forms Server including the start up time.
3) What is the ideal configuration required for each tier (iAS Server,Database Server and Client) to host Forms on to Web considering our application as Medium scale.
(Presently our configuration are,
Application Server Configuration : Windows NT 4 with service pack 3,256 MB RAM,1 GB Virtual memory and 4GB free space and almost the same configuration is being used for
Database Configuration.
Client Configuration : Windows 98 with 64MB RAM).
4) Is there any way to track the performance and know the problem areas like TRACE.
Gopi Kumar
null

A couple of questions for you:
1) What version of IAS are you using?
2) What's the version of Forms&Reports and
3) What version of patch are you using if any
for forms&Reports?
4) What applications are you running on the
machine where Forms&Reports is installed?
(I mean non-Oracle applications?)
The problem could be that, the base addresses
of the DLL's in Forms&Reports could be having base address conflicts with some other application's DLL's.
Forms and Reports needs to be fully rebased to achieve full performance on NT. Before release of Forms and Reports, Oracle rebases all DLLs. Rebasing assigns unique base addresses to all of the DLL's in use by an executable. A properly based DLL will load at its preferred base address, greatly improving the efficiency of memory utilization and the runtime performance of the executable.
Multiple utilities are available on NT to verify proper rebasing of DLLs. HandleEx v4.0 is one such freeware from Sysinternals and is available at www.sysinternals.com. Some others are "depends.exe" that's part of the MS Visual Studio or msinfo32.exe that comes with Office 2000 on NT.
If after running any of these utilities you discover that the DLL's ar not properly rebased, you need to contact Oracle worldwide support.
If you find that rebasing is not the problem, then please post your feedback again. Hope this helps.

Using Reference Cursor Performance Issue in Report

Hi,
Are reference cursor supposed to be faster than a normal query? The reason why I am asking is because I am using a reference cusor query in the data model and it has a performance issue on the report, it's taking quite a while to run than If I just run the same reference cursor query in sql*plus. The difference is significantly big. Any input is very much appreciated!
Thanks,
Marilyn

From the metalink bug 4372868 on 9.0.4.x. It was fixed on 10.1.2.0.2 and does not have a backport for any 9.0.4 version.
Also the 9.0.4 version is already desupported. Please see the note:
Note 307042.1
Topic: Desupport Notices - Oracle Products
Title: Oracle Reports 10g 9.0.4 & 9.0.4.x
Action plan:
If you are still on 9.0.4 and later version of oracle reports and have no plan yet to migrate to 10.1.2.0.2 version use the same query you are using in your reference cursor and use it as a plain SQL query in your reports data model.

Performance issue with report server

we have recently migrated our application from c/s 6i to 10g web (Oracle AS rel 10.1.2). when we are running one balsheet report it was taking about 16-17min to complete running in web. We are using rwservlet to run this report. to my annoyance the same report when run in c/s environment (with same parameters) takes hardly 1min to complete running. The report has 10 pages in all. what we have observed from em console is that that it formats first 5-6pages of the report in just 150-200secs but later for other pages it is taking lot of time. we have even tried out using jvmoptions but that did not help me either. I request any one of you to suggest me as to what can be done at the application server level so that i can acheive the performance of the c/s version report. I am novice to oracle reports and any help is highly appreciated.
Regards
Murali

We seem to have fixed the problem of hanging/slow reports by configuring the init.ora file and changing the optimizer_mode to FIRST_ROWS_10. We set the workarea_size_policy to AUTO too and reports sped up significantly, I don't know the exact changes because our DBA's did them but I think the optimizer was the key change.

Oracle Reports - Multi lingual pdf - jvm error

Hi all,
We are trying to develop a multilingual pdf report in oracle reports 9i. When we do font subsetting or embedding we get the error:
stackpointer=3bb03200
JVMXM004: JVM is performing abort shutdown sequence
this error is consistent for font embedding, but for subsetting this error comes randomly. We are unable to find out any pattern of the error. Can any one pls give us an update on this.

1) Please try in latest patchset 9.0.2.3
2) There is recently a very similar bug logged on the issue by a customer ( do not know whether it is by you :-))
BUG 3880762 - REPORTS ENGINE CRASHES WHEN GENERATING LARGE PDF SUBSETTING OUTPUT
(Not yet fixed, this bug in initial description phase)
(It gives same error)
If this is critical to you then can try getting in touch with Support to escalate the priority of the bug.
(First confirm with support whether it is the same issue)
[    All Docs for all versions    ]
http://otn.oracle.com/documentation/reports.html
[     Publishing reports to web - 10G ]
http://download.oracle.com/docs/html/B10314_01/toc.htm (html)
http://download.oracle.com/docs/pdf/B10314_01.pdf (pdf)
[   Building reports - 10G ]
http://download.oracle.com/docs/pdf/B10602_01.pdf (pdf)
http://download.oracle.com/docs/html/B10602_01/toc.htm (html)
[   Forms Reports Integration whitepaper 9i ]
http://otn.oracle.com/products/forms/pdf/frm9isrw9i.pdf
---------------------------------------------------------------------------------

Help desiging a 10g Oracle Report with Matrix and Lexical Parameters - Long

Hello all:
I apologize in advance for this long post.... I'm using Oracle Reports 10g (9.0.4.0.33). First -- the question:
I need to create a Matrix where the rows come from one database table
(TABLE1) and the columns and cell contents come from a linked query (pulled from TABLE2) that is generated with lexical parameters based on the current TABLE1 row. The lexical parameters contain a WHERE clause for the TABLE2 query. Basically, I have a linked query between TABLE1 and TABLE2. I need to generate a Matrix around it.
Does anyone know if this is even possible?
Here's the background on the application, if that is helpful...
I have an application where I maintain database tables containing names/addresses along with information pertaining to them. As part of the processing, I need to produce reports that contain statistics based on values in the table. For example, each row has a field RTYPE that identifies the Record Type (1-Suppress, 2-Buyer, 3-Inquirer). Each row also has a last purchase date field. The statistics produced for this field would look like this:
 2001 2002 2003 11/03 12/03 01/04 02/04 03/04 04/04 05/04 ...
Buyer 100 150 250 30 25 15 8 9 22 83
Inquirer 1000 800 493 ...
Suppress ... ...
Totals ... ...
Each cell contains the count of the number of records that have the corresponding RTYPE and Last Purchase date. The dates across the top are determined by the most recent purchase date in the file. We count the last 12 months, month by month, and then anything older than that is grouped by
year of purchase. So, the column headings are variable.
The SQL query for this example looks like this:
SELECT CASE WHEN rtype = '2' THEN 'Buyers'
WHEN rtype = '3' THEN 'Inquirers'
WHEN rtype = '1' THEN 'Suppress'
END HLDESC,
CASE WHEN MONTHS_BETWEEN(trunc(:MAXHLDATE,'MONTH'),
TRUNC(T.HOTLINE,'MONTH')) < 12
THEN TO_CHAR(T.HOTLINE,'YYYYMM')
ELSE TO_CHAR(T.HOTLINE,'YYYY') || '00'
END YYMM_8,
CASE WHEN MONTHS_BETWEEN(trunc(:MAXHLDATE,'MONTH'),
TRUNC(T.HOTLINE,'MONTH')) < 12
THEN TO_CHAR(T.HOTLINE,'MM/YY')
ELSE TO_CHAR(T.HOTLINE, 'YYYY')
END FmtDate_8,
COUNT(*) HLCOUNT
FROM &TABLENAME T
GROUP BY CASE WHEN rtype = '2' THEN 'Buyers'
WHEN rtype = '3' THEN 'Inquirers'
WHEN rtype = '1' THEN 'Suppress'
END,
CASE WHEN MONTHS_BETWEEN(trunc(:MAXHLDATE,'MONTH'),
TRUNC(T.HOTLINE,'MONTH')) < 12
THEN TO_CHAR(T.HOTLINE,'YYYYMM')
ELSE TO_CHAR(T.HOTLINE,'YYYY') || '00'
END,
CASE WHEN MONTHS_BETWEEN(trunc(:MAXHLDATE,'MONTH'),
TRUNC(T.HOTLINE,'MONTH')) < 12
THEN TO_CHAR(T.HOTLINE,'MM/YY')
ELSE TO_CHAR(T.HOTLINE, 'YYYY')
END
ORDER BY CASE WHEN MONTHS_BETWEEN(trunc(:MAXHLDATE,'MONTH'),
TRUNC(T.HOTLINE,'MONTH')) < 12
THEN TO_CHAR(T.HOTLINE,'YYYYMM')
ELSE TO_CHAR(T.HOTLINE,'YYYY') || '00'
END
There might be a better way to write this, but that isn't the issue at the moment.
I have many different tables, each with different fields. I need to produce counts on each of those fields. Some of those fields have a limited number of values where I need to count the occurrences and attach a description (like the RTYPE counts above). Others, like Last Purchase Amount, require counts within ranges (between 0 and 9.99, 10 and 19.99, etc.). Still others are "multiple choice"-style fields (such as products purchased), where we have multiple single-char flags that are not null when the corresponding products are purchased. In this case, we need to produce statistics that look like this:
 2001 2002 2003 11/03 12/03 01/04 02/04 03/04 04/04 05/04 ...
Product 1 .........
Product 2 .........
The worst of the bunch is a field where I need to count the occurrence of each value within it (hundreds of values) without entering descriptions, so I don't know how many rows will appear ahead of time. This is used for "source codes" that identify where the name/address came from. They look similar to the RTYPE above, but the leftmost column contains each value from the field rather than a description. There are so many possible values and they change so often that it isn't feasible to enter a description for each one.
Right now, I manually create an Oracle Report for each table when I design/load it. This is becoming difficult to manage, since I have over 150 of them now. Each of these reports can have any number of matrices to display (the largest right now has about 25).
The new table structure to generate these reports consists of two tables: A COUNTHDR table and a COUNTROW table. The COUNTHDR table represents a single Matrix within the report. It contains info such as a heading for the Matrix and whether column totals should be calculated or not. The COUNTROW table contains a description for each row and an SQL Fragment that contains an appropriate WHERE clause to match the description. In the event of a "source code" style count, COUNTHDR has the name of the field to count. COUNTROWs won't exist, so I'll be handling those counts differently. But, ignoring that issue for now, the report structure looks like this:
+ Q1 +
|
+ COUNTHDR +
|
+ COUNTROW +
| linked query
+ Q2 +
|
+ COUNTDTL +
Q2 is the query with lexical parameters for the table and "where clause" that identifies the actual statistic I need counted. I need fields from COUNTROW and COUNTDTL to form a Matrix.
Can this be done? How?
Of course, if anyone out there has a better idea on how to achieve my goal of not writing a report per table, please let me know!! :-)
TIA
Eric Raskin
PS. This structure does not exactly duplicate my original query, since multiple Matrix rows are created by the single SQL query given in the example. Instead, I'll end up executing an SQL query for each row, which is less than desirable. The design will need some tweaking...
PPS. I have tried handling this problem by pre-counting the target table and storing the results in a COUNTCOL table, containing the details of the matrix. This actually does work, but the performance is terrible. I have one "source code"-style count that generated over 20,000 detail cells, including all the "0" cells needed to fill out the matrix. If you don't generate the "0" cells, you get holes in the matrix presentation and/or error messages (which I can explain if you wish). I never did get Oracle Reports to print this one -- I gave up after an hour of runtime on a P4 3GHz machine connected via Gigabit Ethernet to the server. Hence the attempt to push the SQL Queries back into the Oracle Report itself.
Eric H. Raskin Voice: 914-765-0500
Professional Advertising Systems Inc. Fax: 914-765-0503
200 Business Park Dr Suite 107 [email protected]
Armonk, NY 10504

Hi there
here's example of my code
Html header of the page :
<script language="JavaScript" type="text/javascript">
function callMyPopup (formItem1,formItem2) {
var formVal1 = document.getElementById(formItem1).value;
var formVal2 = document.getElementById(formItem2).value;
var url;
url = 'f?p=&APP_ID.:8:&APP_SESSION.::::P8_PROJECT,P8_PDRL_NO:' + formVal1 + ',' + formVal2;
w = open(url,"winLov","Scrollbars=1,resizable=1,width=800,height=600");
if (w.opener == null)
w.opener = self;
w.focus();
</script>
troubleshooting
1.Test each parameter separate first - each work ?
2.Use code above, rerig it, create multiple parameter
3.try again...
hope this helps...
check your orginial source (page where items are) - what data

Key Mapping with Oracle Reports

I am currently trying to run report requests using the Oracle Report Server however the problem that I have is that we need to send database username/password information over the network. From a security perspective this is not acceptable.
One way we were going to get around this is to "wrap" the Oracle Report servlet with another servlet, so the client browser sends the wrapper servlet information such as report location and report name, and the
wrapper servlet adds in additional information such as the username and
password, eliminating the need for the client application to know this information.
The problem is that the URL returned to the client when the report is generated contains the username/password, which again is not
acceptable. As I have seen mention that Oracle Reports can be run over the Internet,
I assume that there is a mechanism for hiding this information. Do you know how to achieve this?.
I am keen to just hard code the user name, password, and database connection into a key mapping file to resolve this security issue. However we are having trouble getting this method to work with the Oracle Report Servlet. We are using WebLogic Server to serve these servlets.

Hello,
Here is an extract from Reports documentation:
Oracle9iAS Reports Services Publishing Reports to the Web
Release 2 (9.0.2)
Part Number A92102-01
3.3.2 Reloading the Key Map File
Use the RELOAD_KEYMAP parameter to specify whether the key map file
(cgicmd.dat) should be reloaded each time the servlet receives a request.
For example:
RELOAD_KEYMAP=yes
This is useful if you frequently make changes to the map file and want the
process of loading your changes to be automatic. Runtime performance will be
affected according to how long it takes to reload the file.
Typically, this parameter is set to no in a production environment and yes in
a testing environment.
Regards

Regarding Performance tunning...

HI Experts,
can you suggest me, how exactly performance is checked.
what is the measure we considered for performance check.
what are ideals status of the performance check for a certain program.
that is, how much should be database use, abap use and the system
use in the program.
i checked my program in t-code SE30, and it is showing almost
above 90% use of database and very less use of abap and
almost no use of system.
so please tell me exactly how much it should be...
Thanks in advance.
Regard,
vijay chavan

Hi
these are the ways of checking performance of a report
Tools for Performance Analysis
Run time analysis transaction SE30
SQL Trace transaction ST05
Extended Program Check (SLIN)
Code Inspector ( SCI)
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 a particular database table of the ABAP program would be 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.
Extended Program Check
This can be called in through transaction SE38 or through transaction SLIN. This indicates possible problems that may cause performance problems.
Code Inspector (SCI)
You can call the Code Inspector from the ABAP Editor (SE38), the Function Builder (SE37), the Class Builder (SE24), or as a separate transaction (SCI).
The Code Inspector indicates possible problems. However, note that, especially with performance issues: There is no rule without exception. If a program passes an inspection, it does not necessarily mean that this program will have no performance problems.
Run time analysis transaction SE30
steps
In Transaction SE30, fill in the transaction name or the program name which needs to be analyzed for performance tuning.
For our case, let this be ZABAP_PERF_TUNING
Run time analysis transaction SE30
After giving the required inputs to the program, execute it. After the final output list has been displayed, PRESS the BACK button.
On the original SE30 screen, now click on ANALYZE button.
The percentage across each of the areas ABAP/ Database/System shows the percentage of total time used for those areas and load on these areas while running the program . The lesser the database load faster the program runs.
SQL Trace ST05
steps
Starting the Trace:
To analyze a trace file, do the following:
Choose the menu path Test  Performance Trace in the ABAP Workbench or go to Transaction ST05. The initial screen of the test tool appears. In the lower part of the screen, the status of the Performance Trace is displayed. This provides you with information as to whether any of the Performance Traces are switched on and the users for which they are enabled. It also tells you which user has switched the trace on.
Using the selection buttons provided, set which trace functions you wish to have switched on (SWL trace, enqueue trace, RFC trace, table buffer trace).
If you want to switch on the trace under your user name, choose Trace on. If you want to pass on values for one or several filter criteria, choose Trace with Filter. Typical filter criteria are: the name of the user, transaction name, process name, and program name.
Now run the program to be analyzed.
Stopping the Trace:
To deactivate the trace:
Choose Test Performance Trace in the ABAP Workbench. The initial screen of the test tool appears. It contains a status line displaying the traces that are active, the users for whom they are active, and the user who activated them.
Select the trace functions that you want to switch off.
Choose Deactivate Trace. If you started the trace yourself, you can now switch it off immediately. If the performance trace was started by a different user, a confirmation prompt appears before deactivation-
Analyzing a Sample trace data:
PREPARE: Prepares the OPEN statement for use and determines the access method.
OPEN: Opens the cursor and specifies the selection result by filling the selection fields with concrete values.
FETCH: Moves the cursor through the dataset created by the OPEN operation. The array size displayed beside the fetch data means that the system can transfer a maximum package size of 392 records at one time into the buffered area.
Reward if useful

Performance Tunning - Oracle Reports 6i

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