The property extension repository adapter is configured using the WebSphere Application Server administrative console or the wsadmin commands. See your WebSphere administrative console documentation. If you need to modify this configuration, you can manually edit the wimconfig.xml file, although this is not the preferred method.
<config:repositories xsi:type="config:PropertyExtensionRepositoryType" id="LA" databaseType="db2" dataSourceName="jdbc/wimLA" dbURL="jdbc:db2:wim" dbAdminId="DB_ADMIN_ID" dbAdminPassword="DB_PASSWORD"/>
You can also specify user-defined bufferpools when creating the federated repository tables on DB2 for z/OS. Use the tablesBufferPool, LOBtablesBufferPool, and indextablesBufferPool parameters with the setupIdMgrPropertyExtensionRepositoryTables wsadmin command.
For more information about these commands, see the topics, IdMgrRepositoryConfig command group for the AdminTask object and Setting up an entry mapping repository, a property extension repository, or a custom registry database repository using wsadmin commands in the WebSphere Application Server information center.