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Full Discussion: DB2 - Performance Issue using MERGE option
Top Forums Programming DB2 - Performance Issue using MERGE option Post 303018423 by Perlbaby on Wednesday 6th of June 2018 03:56:53 AM
Old 06-06-2018
Hi Robin
First Thing : Thank you for looking into it and providing valid suggestions.

Made few changes :
1.I have removed distinct in the select query.
2.I already have indexes for both tables for required columns as below.

Code:
--staging 
CREATE UNIQUE INDEX schemaname.PK_Customer_Staging
    ON schemaname.Customer_Staging(Name ,CUST_ID,ORG_ID)
ALLOW REVERSE SCANS PAGE SPLIT SYMMETRIC

--target
CREATE UNIQUE INDEX schemaname.PK_Customer_Table
    ON schemaname.Customer_Table(Name ,CUST_ID,ORG_ID)
ALLOW REVERSE SCANS PAGE SPLIT SYMMETRIC

3.I observed my db2 uses MAX_LOG => 32 and LOGPRIMARY is 12(No way to extend this as its max provided by tool client ) and do get transaction log space error while loading first time since no data exists in target table.

Is there any way to split the logic based on row count and insert data in two parts . Like First 5 Million , then 5=M to Max count .
Or any other approach to load huge 8 Million data . Any help appreciated.
 

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LEARN ABOUT PHP

pdo_odbc-dsn

PDO_ODBC-DSN(3) 							 1							   PDO_ODBC-DSN(3)

PDO_ODBC DSN - Connecting to ODBC or DB2 databases

	The PDO_ODBC Data Source Name (DSN) is composed of the following elements:

	      o DSN prefix
		-  The	DSN  prefix is odbc:. If you are connecting to a database cataloged in the ODBC driver manager or the DB2 catalog, you can
		append the cataloged name of the database to the DSN.

	      o DSN
		- The name of the database as cataloged in the ODBC driver manager or the DB2 catalog. Alternately, you  can  provide  a  complete
		ODBC connection string to connect to a database as described at http://www.connectionstrings.com/.

	      o UID  -	The  name  of the user for the connection. If you specify the user name in the DSN, PDO ignores the value of the user name
		argument in the PDO constructor.

	      o PWD - The password of the user for the connection. If you specify the password in the DSN, PDO ignores the value of  the  password
		argument in the PDO constructor.

       Example #1

	      PDO_ODBC DSN example (ODBC driver manager)

	       The following example shows a PDO_ODBC DSN for connecting to an ODBC database cataloged as testdb in the ODBC driver manager:

	      odbc:testdb

       Example #2

	      PDO_ODBC DSN example (IBM DB2 uncataloged connection)

	       The following example shows a PDO_ODBC DSN for connecting to an IBM DB2 database named SAMPLE using the full ODBC DSN syntax:

	      odbc:DRIVER={IBM DB2 ODBC DRIVER};HOSTNAME=localhost;PORT=50000;DATABASE=SAMPLE;PROTOCOL=TCPIP;UID=db2inst1;PWD=ibmdb2;

       Example #3

	      PDO_ODBC DSN example (Microsoft Access uncataloged connection)

	       The  following  example	shows a PDO_ODBC DSN for connecting to a Microsoft Access database stored at C:db.mdb using the full ODBC
	      DSN syntax:

	      odbc:Driver={Microsoft Access Driver (*.mdb)};Dbq=C:\db.mdb;Uid=Admin

PHP Documentation Group 													   PDO_ODBC-DSN(3)
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