XI to XI connection -- performance tuning possibilities

Hi
We have two XI systems connected to each other in the following manner :
R3-1 > XI1> XI2 --> R3-2
The connection uses XI Adapter - with XI1 using the path prefix
/sap/xi/engine?type=entry
How do we optimize / fine tune the ability of XI2 to receive as many parallel calls from XI1 ? What parameters in the ICF on XI2 should be play around with to increase parallel processing capability of messages on XI2 - that it gets from XI1 ?

The parameter EO_INBOUND_PARALLEL would surely affect the performance for async calls.
This is not specific to XI to XI communicaiton but this will improve the performance through parallel processing
Regards,
Prateek

Similar Messages

Performance tuning of BPEL processes in SOA Suite 11g

Hi,
We are working with a customer for performance tuning of SOA Suite 11g, one of the areas is to tune the BPEL processes. I am new to this and started out with stress testing Hello World process using SOAPUI tool. I would like help with the below topics -
1. How do I interpret the statistics collected during stress testing? Do we have any benchmark set that can indicate that the performance is ok.
2. Do we need to run stress tests for every BPEL process deployed?
2. Is there any performance tuning strategy documentation available? Or can anybody share his/her experiences to guide me?
Thanks in advance!
Sritama

1. How do I interpret the statistics collected during stress testing? Do we have any benchmark set that can indicate that the performance is ok.
You need
pay attention to:
java heap usage vs java heap capacity
java eden usage vs java eden capacity
JDBC pool initial connections vs JDBC pool capacity connections
if you are using linux: top
if you are using aix: topas
2. Do we need to run stress tests for every BPEL process deployed?
yes, you need test each BPEL. You can use "Jmeter" tool.
Download Jmeter from here: Apache JMeter - Apache JMeter&trade;
Other tools:
jstat
jstack
jps -v
Enterprise Manager
WebLogic Console
VisualVM
JRockit Mission Control
3. Is there any performance tuning strategy documentation available? Or can anybody share his/her experiences to guide me?
I recommend "Oracle SOA Suite 11g Performance Tuning Cookbook" http://www.amazon.com/Oracle-Suite-Performance-Tuning-Cookbook/dp/1849688842/ref=sr_1_1?ie=UTF8&qid=1378482031&sr=8-1&keywords=oracle+soa+suite+11g+performance+tuning+cookbook

Performance Tuning in IR

Hello All,
We have created some reports using Interactive Reporting Studio. The volume of data in that Oracle database are huge and in some tables of the relational database are having above 3-4 crores rows individually. We have created the .oce connection file using the 'Oracle Net' option. Oracle client ver is 10g. We earlier created pivot, chart and report in those .bqy files but had to delete those where-ever possible to decrease the processing time for getting those report generated.
But deleting those from the file and retaining just the result section (the bare minimum part of the file) even not yet helped us out solving the performance issue fully. Still now, in some reports, system gives error message 'Out of Memory' at the time of processing those reports. The memory of the client PCs,wherefrom the reports are being generated are 1 - 1.5 GB. For some reports, even it takes 1-2 hours for saving the results after process. In some cases, the PCs gets hanged at the time of processing. When we extract the query of those reports in sql and run them in TOAD/SQL PLUS, they take not so much time like IR.
Would you please help us out in the aforesaid issue ASAP? Please share your views/tips/suggestions etc in respect of performance tuning for IR. All reply would be highly appreciated.
Regards,
Raj

SQL + & Toad are tools that send SQL and spool results; IR is a tool that sends a request to the database to run SQL and then fiddles with the results before the user is even told data has been received. You need to minimize the time spent by IR manipulating results into objects the user isn't even asking for.
When a request is made to the database, Hyperion will wait until all of the results have been received. Once ALL of the results have been received, then IR will make multiple passes to apply sorts, filters and computed items existing in the results section. For some unknown reason, those three steps are performed more inefficiently then they would be performed in a table section. Only after all of the computed items have been calculated, all filters applied and all sorts sorted, then IR will start to calculate any reports, charts and pivots. After all that is done, the report stops processing and the data has been "returned"
To increase performance, you need to fine tune your IR Services and your BQY docs. Replicate your DAS on your server - it can only transfer 2g before it dies, restarts and your requested document hangs. You can replicated the DAS multiple times and should do so to make sure there are enough resources available for any concurrent users to make necessary requests and have data delivered to them.
To tune your bqy documents...
1) Your Results section MUST be free of any sorts, filters, or computed items. Create a staging table and put any sorts or local filters there. Move as many of your computed items to your database request line and ask the database to make the calculation (either directly or through stored procedures) so you are not at the mercy of the client machine. Any computed items that cannot be moved to the request line, need to be put on your new staging table.
2) Ask the users to choose filters. Programmatically build dynamic filters based on what the user is looking for. The goal is to cast a net only as big as the user needs so you are not bringing back unnecessary data. Otherwise, you will bring your server and client machines to a grinding halt.
3) Halt any report pagination. Built your reports from their own tables and put a dummy filter on the table that forces 0 rows in the table until the report is invoked. Hyperion will paginate every report BEFORE it even tells the user it has results so this will prevent the user from waiting an hour while 1000s of pages are paginated across multiple reports
4) Halt any object rendering until request. Same as above - create a system programmically for the user to tell the bqy what they want so they are not waiting forever for a pivot and 2 reports to compile and paginate when they want just a chart.
5) Saved compressed documents
6) Unless this document can be run as a job, there should be NO results stored with the document but if you do save results with the document, store the calculations too so you at least don't have to wait for them to pass again.
7) Remove all duplicate images and keep the image file size small.
Hope this helps!
PS: I forgot to mention - aside from results sections, in documents where the results are NOT saved, additional table sections take up very, very, very small bits of file size and, as long as there are not excessively larger images the same is true for Reports, Pivots and Charts. Additionally, the impact of file size only matters when the user is requesting the document. The file size is never an issue when the user is processing the report because it has already been delivered to them and cached (in workspace and in the web client)
Edited by: user10899957 on Feb 10, 2009 6:07 AM

LDAP Performance Tuning In Large Deployments - numconnect parameter

LDAP Performance Tuning In Large Deployments - numconnect parameter

Tuning the LDAP connections
(numconnect parameter)
This parameter translates directly into the number of unidas processes that will
be launched when Calendar Server is started. A process takes time to load, uses
RAM, and when active, CPU cycles. And, unidas maintains an LDAP client
connection to a Directory Server which can only support a fixed number of these
connections. Since a calendar client does not require constant directory access
then having a matching number of unidas processes (to match uniengd "client"
processes) is not a good configuration.
Basically, a calendar client will make many requests for LDAP information, even
if the event information being retrieved is not currently view able. For example,
if the calendar client is displaying a week view with 20 events and each event
has 5 attendees, that will translate into at least 100 separate ldap search
requests for the given name and surname of each attendee. What this means is
that an "active" calendar user will require the services of a calendar server
unidas connection quite often.
Recommendation is that you increase the number of unidas connections
to match the number of "active" calendar users. Our experience is that
at least 20% of the number of configured users (lck_users from the
/users/unison/misc/unison.ini file) are actually logged in, and 10% of
those calendar users are active. For example, if have 3000 configured
calendar users, 600 configured are logged in and 10% of the logged in
are active, which would translate into at least 60 unidas connections.
Keep in mind that configured vs logged in vs active might be different at each
customer site, so please adjust your number of unidas connections
accordingly. To set this up, edit the /users/unison/log/unison.ini file and add
the numconnect parameter to the section noted (where "hostname" is the name of
your local host):
[LCK]
lck_users = 600
[hostname,unidas]
numconnect = 60
The calendar server will need to be restarted after making changes
to the /users/unison/log/unison.ini file, before those changes will
take effect.
Note: Due to some architectural changes in the Calendar Server 4.x, the total
number of DAS connections should never be set higher than 250.
Recommendations for num_connect would be a maximum of 5% of logged on users.
However, keep in mind that 250 das connections is a very high number.
Example:
[LCK]
lck_users = 5000
[hostname,unidas]
numconnect = 250

Thank you very much, I am looking from now for a good performance Tuning book writen by Jonathan Lewis. I dont think Jonathan can come to Spain and give lessons...Anyway I will email to him...
But, could you please clarify 2 points to me
1- Should I modify manually memory parameters like buffer cache, shared pool, large pool etc...if those areas are spotted Small and areas causes of performace problem in the AWR, ADDM or ASH reports even if the memory is automatic managed ?
In the case of yes, Why Oracle named it "Memory automatic managed" if I have to set some values of memory manually ?
2- When ADDM report suggests me to increase the SGA size; from where ADDM got this recomandation?. I mean is it recomandation based on statistics collected of Both Oracle and OS ? I am asking this question because, from our report I ran 3 weeks ago, ADDM suggested me to increase the SGA to 10GB (total memeory of the serve is 16GB), I did the change and from that moment the server is SWAP... and now ADDM report suggests me again to increase the SGA to 12GB .
Best reagards

Performance Tuning Guide Needed.

I've seen numerous references to a "Performance Tuning Guide" Is there
any way this document could be posted on the weblogic customer
downloads.
We desperately need this information. Even with working with Support so
far the process has been trial and error. Try this, then try that. I've
burnt many days just playing around with the properties and so far no
luck.
I've read just about every post in the performance newsgroup. Some seem
to be the same types of problems we are currently facing. Great
response when there are about 50 users. Horrible around 65. Slowness
doesn't seem to be gradual. All of a sudden it starts to crawl. So far
I haven't seen any posts regarding solutions (weblogic.properties
settings) which I could try and use.
We are currently using weblogic 4.0.3 on AIX 4.3 with Oracle 8.i. No
native performance pack for that release. Will upgrading to 4.5.1
increase performance dramatically? Our application is very database
dependent. We use a the weblogic connection pool using Oracle's jdbc
thin driver. Note Oracle's OCI driver has numerous bugs related to CLOB
and BLOB retrieval which are used heavily in our database.
Thanks,
Don DeLuca

Hi Don,
I can't comment on the public posting of the Capacity Planning document.
However, I can say that there is no magic formula for optimizing your
WebLogic application. The biggest things to look at are the application
design and code (e.g., unnecessary synchronization code), DBMS configuration
and database design, JVM heap size (bigger is not always better), number of
execute threads (more is not always better), number of database connections
in the pool, whether or not you are using the performance pack, how much
other activity is happening on the server machine, etc. I can tell you that
trying to simulate a large number of clients from a single JVM client (using
lots of threads) will lead you to believe that the server is having problems
when it is really the client software/hardware that is often the limiting
factor. In many of our large benchmarks, we end up using significantly more
hardware for driving the clients than for running the server(s).
Sorry I don't have any better answers for you,
Robert
Don DeLuca wrote:
I've seen numerous references to a "Performance Tuning Guide" Is there
any way this document could be posted on the weblogic customer
downloads.
We desperately need this information. Even with working with Support so
far the process has been trial and error. Try this, then try that. I've
burnt many days just playing around with the properties and so far no
luck.
I've read just about every post in the performance newsgroup. Some seem
to be the same types of problems we are currently facing. Great
response when there are about 50 users. Horrible around 65. Slowness
doesn't seem to be gradual. All of a sudden it starts to crawl. So far
I haven't seen any posts regarding solutions (weblogic.properties
settings) which I could try and use.
We are currently using weblogic 4.0.3 on AIX 4.3 with Oracle 8.i. No
native performance pack for that release. Will upgrading to 4.5.1
increase performance dramatically? Our application is very database
dependent. We use a the weblogic connection pool using Oracle's jdbc
thin driver. Note Oracle's OCI driver has numerous bugs related to CLOB
and BLOB retrieval which are used heavily in our database.
Thanks,
Don DeLuca

Performance tuning through OEM

Hi,
I am unable to run performance tuning pack through OEM. Initially when i was not connected with any production database it worked. Now whenever i click performance manager, performance manager over view, etc it simply hangs where as diagnositc packs such as oracle expert are all working. I have increased the java_pool_size to 50M from 24M both in the remote database machine and in server but still i unable to run it through remote database machine. I have configured rman in the remote database and taking fullbackup, logical back up through it but the performance pack hangs whenever i run it. I am new to dba. statstical report collected through statspack report gives no idea for me to tune. Please help me what to do in this regard to tune the database.
What are the vital points one has to tune and how to tune it.

Brain heart,
As you have mentioned that you are new in Tuning so I shall say first is to understand what exactly we are hunting for.Please read Performance Tuning guide frm oracle docs.
You have not mentioned any version for your db so I am assumig 10g.
http://download.oracle.com/docs/cd/B19306_01/server.102/b14211/toc.htm
Also there is an excellent guide from 9i docs, called Performance Planning also read that one.
And to understand tuning and its various know hows, get these books,
Optimize Oracle Performance--Carry Millsap
Oracle Wait Interface --Richmond Shee
Forecasting Oracle Performance --Craig Shallahamer
These will help you in understanding alot of things which will help for sure.
Aman....

Performance Tuning Tips

Dear All,
In our project we are facing lot of problems with the Performance, users are compaining about the poor performance of the few reports and all, we are in the process of fine tuning the reports by following the all methods/suggestions provided by SAP ( like removing the select queries from Loops, For all entries , Binary serach etc )
But still I want to know from you people what can we check from BASIS percpective ( all the settings ) and also ABAP percpective to improve the performance.
And also I have one more query that what is " Table Statistics " , what is the use of this ...
Please give ur valueble suggestions to us in improving the performance .
Thanks in Advance !

Hi
Ways of Performance Tuning
1. Selection Criteria
2. Select Statements
 Select Queries
 SQL Interface
 Aggregate Functions
 For all Entries
Select Over more than one Internal table
Selection Criteria
1. Restrict the data to the selection criteria itself, rather than filtering it out using the ABAP code using CHECK statement.
2. Select with selection list.
Points # 1/2
SELECT * FROM SBOOK INTO SBOOK_WA.
CHECK: SBOOK_WA-CARRID = 'LH' AND
 SBOOK_WA-CONNID = '0400'.
ENDSELECT.
The above code can be much more optimized by the code written below which avoids CHECK, selects with selection list
SELECT CARRID CONNID FLDATE BOOKID FROM SBOOK INTO TABLE T_SBOOK
WHERE SBOOK_WA-CARRID = 'LH' AND
 SBOOK_WA-CONNID = '0400'.
Select Statements Select Queries
1. Avoid nested selects
2. Select all the records in a single shot using into table clause of select statement rather than to use Append statements.
3. When a base table has multiple indices, the where clause should be in the order of the index, either a primary or a secondary index.
4. For testing existence , use Select.. Up to 1 rows statement instead of a Select-Endselect-loop with an Exit.
5. Use Select Single if all primary key fields are supplied in the Where condition .
Point # 1
SELECT * FROM EKKO INTO EKKO_WA.
SELECT * FROM EKAN INTO EKAN_WA
 WHERE EBELN = EKKO_WA-EBELN.
ENDSELECT.
ENDSELECT.
The above code can be much more optimized by the code written below.
SELECT PF1 PF2 FF3 FF4 INTO TABLE ITAB
 FROM EKKO AS P INNER JOIN EKAN AS F
 ON PEBELN = FEBELN.
Note: A simple SELECT loop is a single database access whose result is passed to the ABAP program line by line. Nested SELECT loops mean that the number of accesses in the inner loop is multiplied by the number of accesses in the outer loop. One should therefore use nested SELECT loops only if the selection in the outer loop contains very few lines or the outer loop is a SELECT SINGLE statement.
Point # 2
SELECT * FROM SBOOK INTO SBOOK_WA.
CHECK: SBOOK_WA-CARRID = 'LH' AND
 SBOOK_WA-CONNID = '0400'.
ENDSELECT.
The above code can be much more optimized by the code written below which avoids CHECK, selects with selection list and puts the data in one shot using into table
SELECT CARRID CONNID FLDATE BOOKID FROM SBOOK INTO TABLE T_SBOOK
WHERE SBOOK_WA-CARRID = 'LH' AND
 SBOOK_WA-CONNID = '0400'.
Point # 3
To choose an index, the optimizer checks the field names specified in the where clause and then uses an index that has the same order of the fields . In certain scenarios, it is advisable to check whether a new index can speed up the performance of a program. This will come handy in programs that access data from the finance tables.
Point # 4
SELECT * FROM SBOOK INTO SBOOK_WA
UP TO 1 ROWS
WHERE CARRID = 'LH'.
ENDSELECT.
The above code is more optimized as compared to the code mentioned below for testing existence of a record.
SELECT * FROM SBOOK INTO SBOOK_WA
 WHERE CARRID = 'LH'.
EXIT.
ENDSELECT.
Point # 5
If all primary key fields are supplied in the Where condition you can even use Select Single.
Select Single requires one communication with the database system, whereas Select-Endselect needs two.
Select Statements contd.. SQL Interface
1. Use column updates instead of single-row updates
to update your database tables.
2. For all frequently used Select statements, try to use an index.
3. Using buffered tables improves the performance considerably.
Point # 1
SELECT * FROM SFLIGHT INTO SFLIGHT_WA.
SFLIGHT_WA-SEATSOCC =
 SFLIGHT_WA-SEATSOCC - 1.
UPDATE SFLIGHT FROM SFLIGHT_WA.
ENDSELECT.
The above mentioned code can be more optimized by using the following code
UPDATE SFLIGHT
 SET SEATSOCC = SEATSOCC - 1.
Point # 2
SELECT * FROM SBOOK CLIENT SPECIFIED INTO SBOOK_WA
WHERE CARRID = 'LH'
 AND CONNID = '0400'.
ENDSELECT.
The above mentioned code can be more optimized by using the following code
SELECT * FROM SBOOK CLIENT SPECIFIED INTO SBOOK_WA
WHERE MANDT IN ( SELECT MANDT FROM T000 )
 AND CARRID = 'LH'
 AND CONNID = '0400'.
ENDSELECT.
Point # 3
Bypassing the buffer increases the network considerably
SELECT SINGLE * FROM T100 INTO T100_WA
BYPASSING BUFFER
WHERE SPRSL = 'D'
 AND ARBGB = '00'
 AND MSGNR = '999'.
The above mentioned code can be more optimized by using the following code
SELECT SINGLE * FROM T100 INTO T100_WA
WHERE SPRSL = 'D'
 AND ARBGB = '00'
 AND MSGNR = '999'.
Select Statements contd Aggregate Functions
 If you want to find the maximum, minimum, sum and average value or the count of a database column, use a select list with aggregate functions instead of computing the aggregates yourself.
Some of the Aggregate functions allowed in SAP are MAX, MIN, AVG, SUM, COUNT, COUNT( * )
Consider the following extract.
 Maxno = 0.
 Select * from zflight where airln = LF and cntry = IN.
 Check zflight-fligh > maxno.
 Maxno = zflight-fligh.
 Endselect.
The above mentioned code can be much more optimized by using the following code.
Select max( fligh ) from zflight into maxno where airln = LF and cntry = IN.
Select Statements contdFor All Entries
 The for all entries creates a where clause, where all the entries in the driver table are combined with OR. If the number of entries in the driver table is larger than rsdb/max_blocking_factor, several similar SQL statements are executed to limit the length of the WHERE clause.
 The plus
 Large amount of data
 Mixing processing and reading of data
 Fast internal reprocessing of data
 Fast
 The Minus
 Difficult to program/understand
 Memory could be critical (use FREE or PACKAGE size)
Points to be must considered FOR ALL ENTRIES Check that data is present in the driver table
 Sorting the driver table
 Removing duplicates from the driver table
Consider the following piece of extract
Loop at int_cntry.
 Select single * from zfligh into int_fligh
where cntry = int_cntry-cntry.
Append int_fligh.
Endloop.
The above mentioned can be more optimized by using the following code.
Sort int_cntry by cntry.
Delete adjacent duplicates from int_cntry.
If NOT int_cntry[] is INITIAL.
 Select * from zfligh appending table int_fligh
 For all entries in int_cntry
 Where cntry = int_cntry-cntry.
Endif.
Select Statements contd Select Over more than one Internal table
1. Its better to use a views instead of nested Select statements.
2. To read data from several logically connected tables use a join instead of nested Select statements. Joins are preferred only if all the primary key are available in WHERE clause for the tables that are joined. If the primary keys are not provided in join the Joining of tables itself takes time.
3. Instead of using nested Select loops it is often better to use subqueries.
Point # 1
SELECT * FROM DD01L INTO DD01L_WA
WHERE DOMNAME LIKE 'CHAR%'
 AND AS4LOCAL = 'A'.
SELECT SINGLE * FROM DD01T INTO DD01T_WA
 WHERE DOMNAME = DD01L_WA-DOMNAME
 AND AS4LOCAL = 'A'
 AND AS4VERS = DD01L_WA-AS4VERS
 AND DDLANGUAGE = SY-LANGU.
ENDSELECT.
The above code can be more optimized by extracting all the data from view DD01V_WA
SELECT * FROM DD01V INTO DD01V_WA
WHERE DOMNAME LIKE 'CHAR%'
 AND DDLANGUAGE = SY-LANGU.
ENDSELECT
Point # 2
SELECT * FROM EKKO INTO EKKO_WA.
SELECT * FROM EKAN INTO EKAN_WA
 WHERE EBELN = EKKO_WA-EBELN.
ENDSELECT.
ENDSELECT.
The above code can be much more optimized by the code written below.
SELECT PF1 PF2 FF3 FF4 INTO TABLE ITAB
 FROM EKKO AS P INNER JOIN EKAN AS F
 ON PEBELN = FEBELN.
Point # 3
SELECT * FROM SPFLI
INTO TABLE T_SPFLI
WHERE CITYFROM = 'FRANKFURT'
 AND CITYTO = 'NEW YORK'.
SELECT * FROM SFLIGHT AS F
 INTO SFLIGHT_WA
 FOR ALL ENTRIES IN T_SPFLI
 WHERE SEATSOCC < F~SEATSMAX
 AND CARRID = T_SPFLI-CARRID
 AND CONNID = T_SPFLI-CONNID
 AND FLDATE BETWEEN '19990101' AND '19990331'.
ENDSELECT.
The above mentioned code can be even more optimized by using subqueries instead of for all entries.
SELECT * FROM SFLIGHT AS F INTO SFLIGHT_WA
 WHERE SEATSOCC < F~SEATSMAX
 AND EXISTS ( SELECT * FROM SPFLI
 WHERE CARRID = F~CARRID
 AND CONNID = F~CONNID
 AND CITYFROM = 'FRANKFURT'
 AND CITYTO = 'NEW YORK' )
 AND FLDATE BETWEEN '19990101' AND '19990331'.
ENDSELECT.
Internal Tables
1. Table operations should be done using explicit work areas rather than via header lines.
2. Always try to use binary search instead of linear search. But dont forget to sort your internal table before that.
3. A dynamic key access is slower than a static one, since the key specification must be evaluated at runtime.
4. A binary search using secondary index takes considerably less time.
5. LOOP ... WHERE is faster than LOOP/CHECK because LOOP ... WHERE evaluates the specified condition internally.
6. Modifying selected components using MODIFY itab TRANSPORTING f1 f2.. accelerates the task of updating a line of an internal table.
Point # 2
READ TABLE ITAB INTO WA WITH KEY K = 'X BINARY SEARCH.
IS MUCH FASTER THAN USING
READ TABLE ITAB INTO WA WITH KEY K = 'X'.
If TAB has n entries, linear search runs in O( n ) time, whereas binary search takes only O( log2( n ) ).
Point # 3
READ TABLE ITAB INTO WA WITH KEY K = 'X'. IS FASTER THAN USING
READ TABLE ITAB INTO WA WITH KEY (NAME) = 'X'.
Point # 5
LOOP AT ITAB INTO WA WHERE K = 'X'.
ENDLOOP.
The above code is much faster than using
LOOP AT ITAB INTO WA.
CHECK WA-K = 'X'.
ENDLOOP.
Point # 6
WA-DATE = SY-DATUM.
MODIFY ITAB FROM WA INDEX 1 TRANSPORTING DATE.
The above code is more optimized as compared to
WA-DATE = SY-DATUM.
MODIFY ITAB FROM WA INDEX 1.
7. Accessing the table entries directly in a "LOOP ... ASSIGNING ..." accelerates the task of updating a set of lines of an internal table considerably
8. If collect semantics is required, it is always better to use to COLLECT rather than READ BINARY and then ADD.
9. "APPEND LINES OF itab1 TO itab2" accelerates the task of appending a table to another table considerably as compared to LOOP-APPEND-ENDLOOP.
10. DELETE ADJACENT DUPLICATES accelerates the task of deleting duplicate entries considerably as compared to READ-LOOP-DELETE-ENDLOOP.
11. "DELETE itab FROM ... TO ..." accelerates the task of deleting a sequence of lines considerably as compared to DO -DELETE-ENDDO.
Point # 7
Modifying selected components only makes the program faster as compared to Modifying all lines completely.
e.g,
LOOP AT ITAB ASSIGNING <WA>.
I = SY-TABIX MOD 2.
IF I = 0.
 <WA>-FLAG = 'X'.
ENDIF.
ENDLOOP.
The above code works faster as compared to
LOOP AT ITAB INTO WA.
I = SY-TABIX MOD 2.
IF I = 0.
 WA-FLAG = 'X'.
 MODIFY ITAB FROM WA.
ENDIF.
ENDLOOP.
Point # 8
LOOP AT ITAB1 INTO WA1.
READ TABLE ITAB2 INTO WA2 WITH KEY K = WA1-K BINARY SEARCH.
IF SY-SUBRC = 0.
 ADD: WA1-VAL1 TO WA2-VAL1,
 WA1-VAL2 TO WA2-VAL2.
 MODIFY ITAB2 FROM WA2 INDEX SY-TABIX TRANSPORTING VAL1 VAL2.
ELSE.
 INSERT WA1 INTO ITAB2 INDEX SY-TABIX.
ENDIF.
ENDLOOP.
The above code uses BINARY SEARCH for collect semantics. READ BINARY runs in O( log2(n) ) time. The above piece of code can be more optimized by
LOOP AT ITAB1 INTO WA.
COLLECT WA INTO ITAB2.
ENDLOOP.
SORT ITAB2 BY K.
COLLECT, however, uses a hash algorithm and is therefore independent
of the number of entries (i.e. O(1)) .
Point # 9
APPEND LINES OF ITAB1 TO ITAB2.
This is more optimized as compared to
LOOP AT ITAB1 INTO WA.
APPEND WA TO ITAB2.
ENDLOOP.
Point # 10
DELETE ADJACENT DUPLICATES FROM ITAB COMPARING K.
This is much more optimized as compared to
READ TABLE ITAB INDEX 1 INTO PREV_LINE.
LOOP AT ITAB FROM 2 INTO WA.
IF WA = PREV_LINE.
 DELETE ITAB.
ELSE.
 PREV_LINE = WA.
ENDIF.
ENDLOOP.
Point # 11
DELETE ITAB FROM 450 TO 550.
This is much more optimized as compared to
DO 101 TIMES.
DELETE ITAB INDEX 450.
ENDDO.
12. Copying internal tables by using ITAB2[ ] = ITAB1[ ] as compared to LOOP-APPEND-ENDLOOP.
13. Specify the sort key as restrictively as possible to run the program faster.
Point # 12
ITAB2[] = ITAB1[].
This is much more optimized as compared to
REFRESH ITAB2.
LOOP AT ITAB1 INTO WA.
APPEND WA TO ITAB2.
ENDLOOP.
Point # 13SORT ITAB BY K. makes the program runs faster as compared to SORT ITAB.
Internal Tables contd
Hashed and Sorted tables
1. For single read access hashed tables are more optimized as compared to sorted tables.
2. For partial sequential access sorted tables are more optimized as compared to hashed tables
Hashed And Sorted Tables
Point # 1
Consider the following example where HTAB is a hashed table and STAB is a sorted table
DO 250 TIMES.
N = 4 * SY-INDEX.
READ TABLE HTAB INTO WA WITH TABLE KEY K = N.
IF SY-SUBRC = 0.
ENDIF.
ENDDO.
This runs faster for single read access as compared to the following same code for sorted table
DO 250 TIMES.
N = 4 * SY-INDEX.
READ TABLE STAB INTO WA WITH TABLE KEY K = N.
IF SY-SUBRC = 0.
ENDIF.
ENDDO.
Point # 2
Similarly for Partial Sequential access the STAB runs faster as compared to HTAB
LOOP AT STAB INTO WA WHERE K = SUBKEY.
ENDLOOP.
This runs faster as compared to
LOOP AT HTAB INTO WA WHERE K = SUBKEY.
ENDLOOP.
Reward if usefull

IIR 2.8.0.7 performance tuning suggestions / documents for Oracle 11?

Would we have any hints or white papers that would support a customer in IIR matching server tuning for initial load performance,
beyond the Siebel specific
Performance Tuning Guidelines for Siebel CRM Application on Oracle Database (Doc ID 781927.1)
which does NOT generate any statistics on the Informatica Schema?
Customer is starting production data load into Siebel UCM of over 5 million customer records . Their current bottle neck seems to be IIR queries and high IIR host resources usage.
This would be for Siebel 8.1.1.4 [21225] on Oracle 11.1.0.6; I currently do not know if ACR 475 with its EBC access is used or not; I'd be looking for any performance tuning suggestions on the Informatica & database side - I have not found anything helpful in the informatica knowledgebase and in the 2.8.0.7 docs the only performance tuning suggestions seem to be on IDT loads.
Obviously performance can be influenced by the matching fields used, but this customer will be looking for performance tuning suggestions keeping the matching fields and thresholds they got approved from the business side.
Any documents we could share?

Hi Varad,
Well, Oracle Metalink actually got it fixed for me! Got to give them credit.
I ran the 1st bit of SQL they sent me and it fixed it so I think it was only cosmetic. I've enclosed all of their response in case others may find themselves in similar situation.
Thanks again for YOUR help too.
Perry
==========================================================
1. Do you see any invalid objects in the database?
2. Please update the SR with the output of running the commands below
1.Connect as SYS.
set serveroutput on (This will let you see if any check fails)
exec validate_apex; (If your version is 2.0 or above)
If all are fine, the registry should be changed to VALID for APEX and you should see the following
message:
PL/SQL procedure successfully completed.
Note : The procedure validate_apex should always complete successfully.
With serveroutput on, it should show why Application Express is listed as invalid.It should show output like:
FAILED CHECK FOR <<obect_name>>
Or
FAILED EXISTENCE CHECK FOR <<object_name>>

CTS+ Performance Tuning Parameters

Hi Experts,
Same Transport is imported in 2 PI Systems lets say PI1 and PI2.
In PI1 the import is very fast and in PI2 it is slow.I did a RFC Destination CTSDEPLOY Connection test and found that in PI1 system it is taking much less time than in PI2.In PI2 system time taken is almost 3 times of time taken in PI1.
Can you please let me know what is the reason?Is there any performance tuning parameters that needs to be configured?If yes can please let me know how and where i.e; in details?
Regards
Anik

Srinivas:
Take look into this guide..it has all the parameters defined and explained
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/70ada5ef-0201-0010-1f8b-c935e444b0ad
more links in this thread
Performance Tuning in XI

Oracle Database 11g: Performance Tuning-Certification

Dear All!
I want to take exam 1z0-054 for
"Oracle Database 11g: Performance Tuning".
I've completed an Oracle authorized couse of "Oracle Database 11g: Performance Tuning DBA" in 2008,which is one of requirements to get that certificate.
Please any info regarding to expiration of complilation of courses?
If I pass 1z0-054 exam ,will the above mentioned couse considered?
And the last one, Are there possibilities to see or load the info of the couses I've completed , to my Oracle site acount.
Thanks in advance!
Best regards

Try posting this type of question in the Certification forum:
Oracle Certification Program

SAP Performance tuning

What measures shall we take if it is needed to performance tune the SAP Server. It is getting too slow. It will be helpful if someone can send me some link about SAP Performance tuning, not ABAP performance tuning.
Regards,
Subhasish

The SAP Servers can be slow because of many reasons:
1. The Table Consistency: The tables should be consistent. A consistency check should be done regulalrly.Better would be using DB13 so that it can be scheduled in appropriate days.
2. One major reason that I have found in recent times is the amount of authorizations that might be available to the users of the sytem. If all the users have a high volume of authorization objects in their user master buffer, then the response time becomes sluggish.This is true for most of the dev boxes that allow almost any amount of authorization for users and have a low RAM size.
3. Also you might be intrested to check your network consistency. If you are accessing your servers from home with a wireless connection of 16kbps, you might want to configure your logon pad for such a crappy connection.
Most of the BASIS performance tuning tasks such as ST04, STAT, ST02 and DB12 should be carried out too just to investigate furthur.
Hope these were a few helpful tips.
Peace be with everybody
-Saurav

R12 Performance Tuning...

Are there any docs or notes that one can to follow for EBS R12 performance tuning ?
Regards,
Rupdipt

Hi,
Please refer to the following links:
Performance Tuning the Apps Database Layer
http://blogs.oracle.com/schan/newsItems/departments/release12/2007/05/17#a1562
Understanding JDBC Connections From the eBusiness Middle Tier
http://blogs.oracle.com/schan/newsItems/departments/release12/2007/09/20#a2051
Performance Tuning for the E-Business Suite
http://blogs.oracle.com/schan/newsItems/departments/release12/2007/12/11#a2297
The following notes/links provide guidelines for setting up JVMs (Jserv groups/OC4J instances) for online applications in Apps 11i and R12:
Note: 362851.1 - Guidelines to setup the JVM in Apps Ebusiness Suite 11i and R12
https://metalink.oracle.com/metalink/plsql/ml2_documents.showDocument?p_database_id=NOT&p_id=362851.1
Note: :462550.1 - Generate JVM heap dump in E-Business suite 11i and R12
https://metalink.oracle.com/metalink/plsql/ml2_documents.showDocument?p_database_id=NOT&p_id=462550.1
Latest JVM Tuning Recommendations for Apps 11i
http://blogs.oracle.com/schan/2007/03/01
Tuning JVMs with Apps 11i
http://blogs.oracle.com/schan/2007/02/16#a1230
Configuring Middle-Tier JVMs for Applications 11i
http://blogs.oracle.com/schan/2006/08/01#a494
For tuning other application components (i.e. CM, initialization parameters, top SQL statements, application tier, ..etc), the following note should be helpful:
Note: 169935.1 - Troubleshooting Oracle Applications Performance Issues
https://metalink.oracle.com/metalink/plsql/ml2_documents.showDocument?p_database_id=NOT&p_id=169935.1
Note: 244040.1 - Oracle E-Business Suite Recommended Performance Patches
https://metalink.oracle.com/metalink/plsql/ml2_documents.showDocument?p_database_id=NOT&p_id=244040.1
Note: 744143.1 - Tuning performance on eBusiness suite
https://metalink.oracle.com/metalink/plsql/ml2_documents.showDocument?p_database_id=NOT&p_id=744143.1
Regards,
Hussein

Performance Tuning of webi report BO4.0

Hi ,
I have report which has two data providers in 1st Data Provider i have 10 objects and in 2nd Data provider i have 3 objects the issue is performance report is taking 6 minutes to run.
Please help me out how we can increase the performance at Query Level.
Thanks
Siva

Hi
There are various levels to which you have to check to improve the performance of reports could be at connection levels, query, database etc.
some of them you can try
1. check array fetch size in relational connection parameters, deactivating array fetch size can increase the efficiency of retrieving your data, but slows server performance.
2. Setting options for the default list of values in business layer and data foundation layer
Automatic refresh - If this is selected, the list of values is automatically refreshed each time the
list is called. This can have an effect on performance each time the list of values is refreshed. You should disable this option if the list of values returns a large number of values.
3. set query stripping (Optimize query with Query Stripping in Web Intelligence - Business Intelligence (BusinessObjects) - SCN Wiki)
4. also check Performance Tuning Methods in BO
Regards,
Raghava

JCo Connection Performance Tuninng

Hi all,
Here's a performance tuning problem occurs when I do the Stress Test for a JCo Connection.
I call bapi with abap model autogenerated by webdynpro wizard, then I developped a method to do this post job(with same data, suppose each post get the right response) for 1, 10, 20, 50 times.
I found the first time it will cost a real long time(such as 21s) to get return, then performance can be better, an average time cost is about 700 ms.
So I think there must be someplace to cache the post data, if I can modify the size of the cache, maybe I can improve the performance.
Now the question is where is it?
Any idea?

Hallo William,
read the SDN article on <a href="https://www.sdn.sap.comhttp://www.sdn.sap.comhttp://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.km.cm.docs/library/webas/webdynpro/how%20to%20configure%20the%20jco%20destination%20settings.pdf">How to configrue the Jco Destination Settings</a>
Regards, Bertram

FDQM performance tuning

Hi,
I've recently installed a FDQM application (EPM 11.1.2.2) on a windows environment 64 bit 2008 R2. It takes me 10 mins to create a application (creating app +connecting to database).
FDQM is configured to run on IIS. Just wondering if anyone has done any performance tuning on FDQM?
Any tips or pointers to any documents will be helpful..
Thanks in Advance!!

It can take a while to create an application, it has never been the fastest at creating them.
If you are looking for tuning then you can look at the DBA guide - http://docs.oracle.com/cd/E17236_01/epm.1112/fdm_dba.pdf
Cheers
John
http://john-goodwin.blogspot.com/

XI to XI connection -- performance tuning possibilities

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