Changing the definition of table PS_TXN use SECUREFICHIERS

Fusion Middleware Version: 11.1.1.7

WebLogic: 10.3.6.0

JDeveloper Build JDEVADF_11.1.1.7.0_GENERIC_130226.1400.6493

Project: Custom Portal Application WebCenter integrated with ADF custom workflows.

During our ADF application performance tests, we noticed that a lot of contention on the LOB segments for the table PS_TXN (supports transactions State passivation/activation).

Movement of the LOB segment to use Oracle SECUREFICHIERS, most other tweaks to the definition of the table showed significantly reduce the contention as providing a much higher throughput for read and write operations.

To implement these changes, we would like to modify the ADF internal script that creates the table in the first place rather manually, dropping the table or by using the online table reorganization.

This approach is documented, and suggests that this can be done my edit script "adfbc_create_statesnapshottables.sql" located under the directory MIDDLEWARE_HOME/oracle_common/sql $.  We tried it, but after letting off the table in a test environment, ADF is re - create the table using the original definition when the application is done after the operation first move.

The same scenario can also be found under $MIDDLEWARE_HOME/oracle_common/modules/oracle.adf.model_11.1.1/bin however edit this file also makes no difference.

Does anyone know what script ADF uses to create the table, or if this is now coded in a class file or some other mechanism?

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Automatic creation of table PS_TXN is hardcoded in the oracle.jbo.pcoll.OraclePersistManager class. Have a look at the statements at the end of the OraclePersistManager.createTable () method (in line 904 according to my decompiler). Other SQL statements (for example to drop the table, to the updates/insertions/deletions in the table, etc.) are defined inside the class oracle.jbo.pcoll.TransactionTableSqlStrings. You can find these classes within $MIDDLEWARE_HOME/oracle_common/modules/oracle.adf.model_11.1.1/adfm.jar.

If your database is not Oracle, but DB2 or MS SQL Server, then you should look at the classes oracle.jbo.pcoll.pmgr.DB2PersistManager and oracle.jbo.pcoll.pmgr.SQLServerPersistManager respectively.

You can override the default value PersistManager (create a new class that extends oracle.jbo.pcoll.OraclePersistManager and override/change the createTable() method), and then specify the new class in the AOS "jbo.pcoll.mgr" configuration property CreateTable() method has a package-level visibility, it would be very easy to do. This approach is delicate and the efforts needed to make does not, in my opinion. If I were you, I would be to pre-create the necessary tables in PS_TXN updated the manually.

Dimitar

PS Scripts SQL "adfbc_create_statesnapshottables.sql" aims to be used by advanced users who want to create their paintings previously manually. These scripts are not used by the infrastructure when it automatically creates the necessary tables.

Tags: Java

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