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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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DB2_CLIENT_INFO(3)							 1							DB2_CLIENT_INFO(3)

db2_client_info - Returns an object with properties that describe the DB2 database client

SYNOPSIS
object db2_client_info (resource $connection) DESCRIPTION
This function returns an object with read-only properties that return information about the DB2 database client. The following table lists the DB2 client properties: DB2 client properties +---------------------+--------------------------------------+---+ | Property name | | | | | | | | | Return type | | | | | | | | Description | | | | | | +---------------------+--------------------------------------+---+ | APPL_CODEPAGE | | | | | | | | | int | | | | | | | | The application code page. | | | | | | | CONN_CODEPAGE | | | | | | | | | int | | | | | | | | The code page for the current con- | | | | nection. | | | | | | | DATA_SOURCE_NAME | | | | | | | | | string | | | | | | | | The data source name (DSN) used to | | | | create the current connection to the | | | | database. | | | | | | | DRIVER_NAME | | | | | | | | | string | | | | | | | | The name of the library that imple- | | | | ments the DB2 Call Level Interface | | | | (CLI) specification. | | | | | | | DRIVER_ODBC_VER | | | | | | | | | string | | | | | | | | The version of ODBC that the DB2 | | | | client supports. This returns a | | | | string "MM.mm" where $MM is the | | | | major version and $mm is the minor | | | | version. The DB2 client always | | | | returns "03.51". | | | | | | | DRIVER_VER | | | | | | | | | string | | | | | | | | The version of the client, in the | | | | form of a string "MM.mm.uuuu" where | | | | $MM is the major version, $mm is the | | | | minor version, and $uuuu is the | | | | update. For example, "08.02.0001" | | | | represents major version 8, minor | | | | version 2, update 1. | | | | | | |ODBC_SQL_CONFORMANCE | | | | | | | | | string | | | | | | | | The level of ODBC SQL grammar sup- | | | | ported by the client: | | | | | | | | o MINIMUM | | | | - Supports the mini- | | | | mum ODBC SQL gram- | | | | mar. | | | | | | | | o CORE | | | | - Supports the core | | | | ODBC SQL grammar. | | | | | | | | o EXTENDED | | | | - Supports extended | | | | ODBC SQL grammar. | | | | | | | ODBC_VER | | | | | | | | | string | | | | | | | | The version of ODBC that the ODBC | | | | driver manager supports. This | | | | returns a string "MM.mm.rrrr" where | | | | $MM is the major version, $mm is the | | | | minor version, and $rrrr is the | | | | release. The DB2 client always | | | | returns "03.01.0000". | | | | | | +---------------------+--------------------------------------+---+ PARAMETERS
o $connection - Specifies an active DB2 client connection. RETURN VALUES
Returns an object on a successful call. Returns FALSE on failure. EXAMPLES
Example #1 A db2_client_info(3) example To retrieve information about the client, you must pass a valid database connection resource to db2_client_info(3). <?php $conn = db2_connect( 'SAMPLE', 'db2inst1', 'ibmdb2' ); $client = db2_client_info( $conn ); if ($client) { echo "DRIVER_NAME: "; var_dump( $client->DRIVER_NAME ); echo "DRIVER_VER: "; var_dump( $client->DRIVER_VER ); echo "DATA_SOURCE_NAME: "; var_dump( $client->DATA_SOURCE_NAME ); echo "DRIVER_ODBC_VER: "; var_dump( $client->DRIVER_ODBC_VER ); echo "ODBC_VER: "; var_dump( $client->ODBC_VER ); echo "ODBC_SQL_CONFORMANCE: "; var_dump( $client->ODBC_SQL_CONFORMANCE ); echo "APPL_CODEPAGE: "; var_dump( $client->APPL_CODEPAGE ); echo "CONN_CODEPAGE: "; var_dump( $client->CONN_CODEPAGE ); } else { echo "Error retrieving client information. Perhaps your database connection was invalid."; } db2_close($conn); ?> The above example will output: DRIVER_NAME: string(8) "libdb2.a" DRIVER_VER: string(10) "08.02.0001" DATA_SOURCE_NAME: string(6) "SAMPLE" DRIVER_ODBC_VER: string(5) "03.51" ODBC_VER: string(10) "03.01.0000" ODBC_SQL_CONFORMANCE: string(8) "EXTENDED" APPL_CODEPAGE: int(819) CONN_CODEPAGE: int(819) SEE ALSO
db2_server_info(3). PHP Documentation Group DB2_CLIENT_INFO(3)
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