Bad performance. How to improve?

Hi!
I have two tables (e.g. T1 and T2) both of the structure:CREATE TABLE T1 (
"ID_G5PZG" VARCHAR2(30 BYTE) NOT NULL ENABLE,
"ID_G5DOK" VARCHAR2(30 BYTE) NOT NULL ENABLE,
"STATUS"   NUMBER(2,0) DEFAULT 1 NOT NULL ENABLE,
CONSTRAINT "G5DOK_G5PZ_PK" PRIMARY KEY ("ID_G5PZG", "ID_G5DOK"),
CONSTRAINT "G5DOK_G5PZ_G5DOK_FK" FOREIGN KEY ("ID_G5DOK") REFERENCES "G5DOK" ("ID") ENABLE,
CONSTRAINT "G5DOK_G5PZ_G5PZG_FK" FOREIGN KEY ("ID_G5PZG") REFERENCES "G5PZG" ("ID") ENABLE
);I run a query:SELECT *
FROM G5DOK_G5PZG_RKRG g5
full JOIN ROG_TEMP_G5DOK_G5PZG_RKRG rt
         on rt.ID_G5DOK = g5.ID_G5DOK
         and rt.ID_G5PZG = g5.ID_G5PZG
         and rt.STATUS = 1 AND g5.STATUS = 1
WHERE rt.STATUS IS NULL
    OR g5.STATUS IS NULL;Explain plan shows very costly NESTED LOOP and the query takes more than 3 minutes to complete with cardinality of 42248 rows in both tables. How may I improve the performance?
--------EDIT--------
I'd like to find rows inT1 that does not exists in T2 and vice versa.

No, I haven't.
EXPLAIN PLAN is:"PLAN_TABLE_OUTPUT"
"Plan hash value: 3694803278"
"| Id | Operation                         | Name                      | Rows | Bytes | Cost (%CPU)| Time     |"
"|   0 | SELECT STATEMENT                  |                           | 44360 | 5198K| 9396   (1)| 00:01:53 |"
"|   1 | VIEW                             |                           | 44360 | 5198K| 9396   (1)| 00:01:53 |"
"|   2 |   UNION-ALL                       |                           |       |       |            |          |"
"|* 3 |    FILTER                         |                           |       |       |            |          |"
"|   4 |     NESTED LOOPS OUTER            |                           | 42248 | 1650K| 9340   (1)| 00:01:53 |"
"|   5 |      TABLE ACCESS FULL            | G5DOK_G5PZG_RKRG          | 42248 |   825K|    56   (2)| 00:00:01 |"
"|   6 |      VIEW                         |                           |     1 |    20 |     0   (0)| 00:00:01 |"
"|* 7 |       FILTER                      |                           |       |       |            |          |"
"|* 8 |        TABLE ACCESS BY INDEX ROWID| ROG_TEMP_G5DOK_G5PZG_RKRG |     1 |    20 |     0   (0)| 00:00:01 |"
"|* 9 |         INDEX RANGE SCAN          | TMP_G5DOK_G5PZ_G5DOK_FK_I | 42248 |       |     0   (0)| 00:00:01 |"
"|* 10 |    FILTER                         |                           |       |       |            |          |"
"| 11 |     TABLE ACCESS FULL             | ROG_TEMP_G5DOK_G5PZG_RKRG | 42248 |   825K|    56   (2)| 00:00:01 |"
"|* 12 |     FILTER                        |                           |       |       |            |          |"
"|* 13 |      TABLE ACCESS BY INDEX ROWID | G5DOK_G5PZG_RKRG          |     1 |    20 |     0   (0)| 00:00:01 |"
"|* 14 |       INDEX UNIQUE SCAN           | G5DOK_G5PZ_PK             |     1 |       |     0   (0)| 00:00:01 |"
"Predicate Information (identified by operation id):"
"   3 - filter(""RT"".""STATUS"" IS NULL)"
"   7 - filter(""G5"".""STATUS""=1)"
"   8 - filter(""RT"".""STATUS""=1 AND ""RT"".""ID_G5PZG""=""G5"".""ID_G5PZG"")"
"   9 - access(""RT"".""ID_G5DOK""=""G5"".""ID_G5DOK"")"
" 10 - filter( NOT EXISTS (SELECT /*+ UNNEST */ 0 FROM ""G5DOK_G5PZG_RKRG"" ""G5"" WHERE :B1=1 AND "
"              ""G5"".""ID_G5DOK""=:B2 AND ""G5"".""ID_G5PZG""=:B3 AND ""G5"".""STATUS""=1))"
" 12 - filter(:B1=1)"
" 13 - filter(""G5"".""STATUS""=1)"
" 14 - access(""G5"".""ID_G5PZG""=:B1 AND ""G5"".""ID_G5DOK""=:B2)"Edited by: JackK on Nov 22, 2010 8:59 AM

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AND podat IN s_podat
AND ernam IN s_ernam
AND kunnr IN s_kunnr
AND vkorg IN s_vkorg
AND vstel IN s_vstel
AND lfart NOT IN r_del_types_exclude.
Waiting for quick response.
Best regards,
BDP

Bansidhar,
1) You need to add a check to make sure that internal table t_dels_tvpod (used in the FOR ALL ENTRIES clause) is not blank. If it is blank skip the SELECt statement.
2) Check the performance with and without clause 'AND lfart NOT IN r_del_types_exclude'. Sometimes NOT causes the select statement to not use the index. Instead of 'lfart NOT IN r_del_types_exclude' use 'lfart IN r_del_types_exclude' and build r_del_types_exclude by using r_del_types_exclude-sign = 'E' instead of 'I'.
3) Make sure that the table used in the FOR ALL ENTRIES clause has unique delivery numbers.
Try doing something like this.
TYPES: BEGIN OF ty_del_types_exclude,
         sign(1)   TYPE c,
         option(2) TYPE c,
         low       TYPE likp-lfart,
         high      TYPE likp-lfart,
       END OF ty_del_types_exclude.
DATA: w_del_types_exclude TYPE          ty_del_types_exclude,
      t_del_types_exclude TYPE TABLE OF ty_del_types_exclude,
      t_dels_tvpod_tmp    LIKE TABLE OF t_dels_tvpod        .
IF NOT t_dels_tvpod[] IS INITIAL.
* Assuming that I would like to exclude delivery types 'LP' and 'LPP'
CLEAR w_del_types_exclude.
REFRESH t_del_types_exclude.
w_del_types_exclude-sign = 'E'.
w_del_types_exclude-option = 'EQ'.
w_del_types_exclude-low = 'LP'.
APPEND w_del_types_exclude TO t_del_types_exclude.
w_del_types_exclude-low = 'LPP'.
APPEND w_del_types_exclude TO t_del_types_exclude.
t_dels_tvpod_tmp[] = t_dels_tvpod[].
SORT t_dels_tvpod_tmp BY vbeln.
DELETE ADJACENT DUPLICATES FROM t_dels_tvpod_tmp
    COMPARING
      vbeln.
SELECT vbeln
    FROM likp
    INTO TABLE lt_dels_tvpod
    FOR ALL ENTRIES IN t_dels_tvpod_tmp
    WHERE vbeln EQ t_dels_tvpod_tmp-vbeln
    AND erdat IN s_erdat
    AND bldat IN s_bldat
    AND podat IN s_podat
    AND ernam IN s_ernam
    AND kunnr IN s_kunnr
    AND vkorg IN s_vkorg
    AND vstel IN s_vstel
    AND lfart IN t_del_types_exclude.
ENDIF.

HOW TO IMPROVE PERFORMANCE ON SUM FUNCTION IN INLINE SQL QUERY

SELECT NVL(SUM(B1.T_AMOUNT),0) PAYMENT,B1.ACCOUNT_NUM,B1.BILL_SEQ
FROM
SELECT P.T_AMOUNT,P.ACCOUNT_NUM,P.BILL_SEQ
FROM PAYMENT_DATA_VIEW P
WHERE TRUNC(P.ACC_PAYMENT_DATE) < '01-JAN-2013'
AND P.CUSTOMER_NAME ='XYZ'
AND P.CLASS_ID IN (-1,1,2,94)
) B1
GROUP BY B1.ACCOUNT_NUM,B1.BILL_SEQ
Above is the query.If we run inner query it takes few second to execute but while we are summing up the same amount and bill_Seq using inline view, it takes time to execute it.
Note: Count of rows selected from inner query will be around >10 Lac
How to improve the performance for this query?
Pls suggest
Thanks in advance

989209 wrote:
SELECT NVL(SUM(B1.T_AMOUNT),0) PAYMENT,B1.ACCOUNT_NUM,B1.BILL_SEQ
FROM
SELECT P.T_AMOUNT,P.ACCOUNT_NUM,P.BILL_SEQ
FROM PAYMENT_DATA_VIEW P
WHERE TRUNC(P.ACC_PAYMENT_DATE) < '01-JAN-2013'
AND P.CUSTOMER_NAME ='XYZ'
AND P.CLASS_ID IN (-1,1,2,94)
) B1
GROUP BY B1.ACCOUNT_NUM,B1.BILL_SEQ
Above is the query.If we run inner query it takes few second to execute but while we are summing up the same amount and bill_Seq using inline view, it takes time to execute it.
Note: Count of rows selected from inner query will be around >10 Lac
How to improve the performance for this query?
Pls suggest
Thanks in advancea) Lac is not an international unit, so is not understood by everyone. This is an international forum so please use international units.
b) Please read the FAQ: {message:id=9360002} to learn how to format your question correctly for people to help you.
c) As your question relates to performance tuning, please also read the two threads linked to in the FAQ: {message:id=9360003} for an idea of what specific information you need to provide for people to help you tune your query.

How to improve the performance of the attached query, Please help

Hi,
How to improve performance of the below query, Please help. also attached explain plan -
SELECT Camp.Id,
rCam.AccountKey,
Camp.Id,
CamBilling.Cpm,
CamBilling.Cpc,
CamBilling.FlatRate,
Camp.CampaignKey,
Camp.AccountKey,
CamBilling.billoncontractedamount,
(SUM(rCam.Impressions) * 0.001 + SUM(rCam.Clickthrus)) AS GR,
rCam.AccountKey as AccountKey
FROM Campaign Camp, rCamSit rCam, CamBilling, Site xSite
WHERE Camp.AccountKey = rCam.AccountKey
AND Camp.AvCampaignKey = rCam.AvCampaignKey
AND Camp.AccountKey = CamBilling.AccountKey
AND Camp.CampaignKey = CamBilling.CampaignKey
AND rCam.AccountKey = xSite.AccountKey
AND rCam.AvSiteKey = xSite.AvSiteKey
AND rCam.RmWhen BETWEEN to_date('01-01-2009', 'DD-MM-YYYY') and
to_date('01-01-2011', 'DD-MM-YYYY')
GROUP By rCam.AccountKey,
Camp.Id,
CamBilling.Cpm,
CamBilling.Cpc,
CamBilling.FlatRate,
Camp.CampaignKey,
Camp.AccountKey,
CamBilling.billoncontractedamount
Explain Plan :-
Description                    Object_owner          Object_name     Cost     Cardinality     Bytes
SELECT STATEMENT, GOAL = ALL_ROWS                              14     1     13
SORT AGGREGATE                                                  1     13
VIEW                         GEMINI_REPORTING               14     1     13
HASH GROUP BY                                        14     1     103
NESTED LOOPS                                        13     1     103
HASH JOIN                                             12     1     85
TABLE ACCESS BY INDEX ROWID     GEMINI_REPORTING     RCAMSIT          2     4     100
NESTED LOOPS                                        9     5     325
HASH JOIN                                        7     1     40
SORT UNIQUE                                        2     1     18
TABLE ACCESS BY INDEX ROWID     GEMINI_PRIMARY          SITE          2     1     18
INDEX RANGE SCAN          GEMINI_PRIMARY          SITE_I0          1     1
TABLE ACCESS FULL          GEMINI_PRIMARY          SITE          3     27     594
INDEX RANGE SCAN          GEMINI_REPORTING     RCAMSIT_I     1     1     5
TABLE ACCESS FULL     GEMINI_PRIMARY     CAMPAIGN                    3     127     2540
TABLE ACCESS BY INDEX ROWID     GEMINI_PRIMARY          CAMBILLING     1     1     18
INDEX UNIQUE SCAN     GEMINI_PRIMARY     CAMBILLING_U1                    0     1

Hello,
This has really nothing to do with the Oracle Forms product.
Please, send the SQL or/and PL/SQL questions in the corresponding forums.
Francois

How to improve the performance of the application

Hi,
We have customized the standard SRM BSP application and integrated to portal.
Now it has got some performence issues. It is taking time to load the page and also while navigating between the views.
We have done the performence tuning for the application to the maximum extent. But the problem is while loading the application, its taking time.
Can anyone suggest how to improve the performence of the Application.
Thanks & Regards
Warun

The system configuration is more than enough to run java applications.
You are probalbly doing time-consuming operations in the event thread. Which blocks the event thread and the gui seems not to be responding. If you you have a very bad design.
Use a thread for time consuming operations.

How to improve the performance of the abap program

hi all,
I have created an abap program. And it taking long time since the number of records are more. And can anyone let me know how to improve the performance of my abap program.
Using se30 and st05 transaction.
can anyone help me out step by step
regds
haritha

Hi Haritha,
->Run Any program using SE30 (performance analysis)
Note: Click on the Tips & Tricks button from SE30 to get performance improving tips.
Using this you can improve the performance by analyzing your code part by part.
->To turn runtim analysis on within ABAP code insert the following code
SET RUN TIME ANALYZER ON.
->To turn runtim analysis off within ABAP code insert the following code
SET RUN TIME ANALYZER OFF.
->Always check the driver internal tables is not empty, while using FOR ALL ENTRIES
->Avoid for all entries in JOINS
->Try to avoid joins and use FOR ALL ENTRIES.
->Try to restrict the joins to 1 level only ie only for tables
->Avoid using Select *.
->Avoid having multiple Selects from the same table in the same object.
->Try to minimize the number of variables to save memory.
->The sequence of fields in 'where clause' must be as per primary/secondary index ( if any)
->Avoid creation of index as far as possible
->Avoid operators like <>, > , < & like % in where clause conditions
->Avoid select/select single statements in loops.
->Try to use 'binary search' in READ internal table. -->Ensure table is sorted before using BINARY SEARCH.
->Avoid using aggregate functions (SUM, MAX etc) in selects ( GROUP BY , HAVING,)
->Avoid using ORDER BY in selects
->Avoid Nested Selects
->Avoid Nested Loops of Internal Tables
->Try to use FIELD SYMBOLS.
->Try to avoid into Corresponding Fields of
->Avoid using Select Distinct, Use DELETE ADJACENT
Check the following Links
Re: performance tuning
Re: Performance tuning of program
http://www.sapgenie.com/abap/performance.htm
http://www.thespot4sap.com/Articles/SAPABAPPerformanceTuning_PerformanceAnalysisTools.asp
check the below link
http://www.sap-img.com/abap/performance-tuning-for-data-selection-statement.htm
See the following link if it's any help:
http://www.thespot4sap.com/Articles/SAPABAPPerformanceTuning_PerformanceAnalysisTools.asp
Check also http://service.sap.com/performance
and
books like
http://www.sap-press.com/product.cfm?account=&product=H951
http://www.sap-press.com/product.cfm?account=&product=H973
http://www.sap-img.com/abap/more-than-100-abap-interview-faqs.htm
http://www.thespot4sap.com/Articles/SAPABAPPerformanceTuning_PerformanceAnalysisTools.asp
Performance tuning for Data Selection Statement
http://www.sap-img.com/abap/performance-tuning-for-data-selection-statement.htm
Debugger
http://help.sap.com/saphelp_47x200/helpdata/en/c6/617ca9e68c11d2b2ab080009b43351/content.htm
http://www.cba.nau.edu/haney-j/CIS497/Assignments/Debugging.doc
http://help.sap.com/saphelp_erp2005/helpdata/en/b3/d322540c3beb4ba53795784eebb680/frameset.htm
Run Time Analyser
http://help.sap.com/saphelp_47x200/helpdata/en/c6/617cafe68c11d2b2ab080009b43351/content.htm
SQL trace
http://help.sap.com/saphelp_47x200/helpdata/en/d1/801f7c454211d189710000e8322d00/content.htm
CATT - Computer Aided Testing Too
http://help.sap.com/saphelp_47x200/helpdata/en/b3/410b37233f7c6fe10000009b38f936/frameset.htm
Test Workbench
http://help.sap.com/saphelp_47x200/helpdata/en/a8/157235d0fa8742e10000009b38f889/frameset.htm
Coverage Analyser
http://help.sap.com/saphelp_47x200/helpdata/en/c7/af9a79061a11d4b3d4080009b43351/content.htm
Runtime Monitor
http://help.sap.com/saphelp_47x200/helpdata/en/b5/fa121cc15911d5993d00508b6b8b11/content.htm
Memory Inspector
http://help.sap.com/saphelp_47x200/helpdata/en/a2/e5fc84cc87964cb2c29f584152d74e/content.htm
ECATT - Extended Computer Aided testing tool.
http://help.sap.com/saphelp_47x200/helpdata/en/20/e81c3b84e65e7be10000000a11402f/frameset.htm
Just refer to these links...
performance
Performance
Performance Guide
performance issues...
Performance Tuning
Performance issues
performance tuning
performance tuning
You can go to the transaction SE30 to have the runtime analysis of your program.Also try the transaction SCI , which is SAP Code Inspector.
edited by,
Naveenan

How to improve the performance of serialization/deserialization?

Hi, Friends,
I have a question about how to improve the performance of serialization/deserialization.
When an object is serialized, the entire tree of objects rooted at the object is also serialized. When it is deserialized, the tree is reconstructed. For example, suppose a serializable Father object contains (a serializable field of) an array of Child objects. When a Father object is serialized, so is the array of Child objects.
For the sake of performance consideration, when I need to deserialize a Father object, I don't want to deserialize any Child object. However, I should be able to know that Father object has children. I should also be able to deserialize any child of that Father object when necessary.
Could you tell me how to achieve the above idea?
Thanks.
Youbin

You could try something like this...
import java.io.*;
import java.util.*;
class Child implements Serializable {
    int id;
    Child(int _id) { id=_id; }
    public String toString() { return String.valueOf(id); }
class Father implements Serializable
    Child[] children = new Child[10];
    public Father() {
     Arrays.fill(children, new Child(1001));
    public void readObject(ObjectInputStream stream)
     throws IOException, ClassNotFoundException
     int numchildren = stream.readInt();
     for(int i=0; i<numchildren; i++)
         children[i] = (Child)stream.readObject();
     stream.close();
    public void writeObject(ObjectOutputStream stream) throws IOException
     stream.writeInt(children.length);
     for(int i=0; i<children.length; i++)
         stream.writeObject(children);
     stream.close();
Child[] getChildren() { return children; }
class FatherProxy
int numchildren;
String filename;
public FatherProxy(String _filename) throws IOException
     filename = _filename;
     ObjectInputStream ois =
     new ObjectInputStream(new FileInputStream(filename));
     numchildren = ois.readInt();
     ois.close();
int getNumChildren() { return numchildren; }
Child[] getChildren() throws IOException, ClassNotFoundException
     ObjectInputStream ois =
     new ObjectInputStream(new FileInputStream(filename));
     Father f = (Father)ois.readObject();
     ois.close();
     return f.getChildren();
public class fatherref
public static void main(String[] args) throws Exception
     // create the serialized file
     Father f = new Father();
     ObjectOutputStream oos =
     new ObjectOutputStream(new FileOutputStream("father.ser"));
     oos.writeObject(f);
     oos.close();
     // read in just what is needed -- numchildren
     FatherProxy fp = new FatherProxy("father.ser");
     System.out.println("numchildren: " + fp.getNumChildren());
     // do some processing
     // you need the rest -- children
     Child[] c = fp.getChildren();
     System.out.println("children:");
     for(int i=0; i<c.length; i++)
     System.out.println("i " + i + ": " + c[i]);

Bad performance. How to improve?

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