If you read from Oracle, Sybase ASE, or Microsoft SQL Server sources, you can improve the performance by increasing the network packet size. Increase the network packet size to allow larger packets of data to cross the network at one time. Increase the network packet size based on the database you read from:
You can increase the database server network packet size in listener.ora and tnsnames.ora. Consult your database documentation for additional information about increasing the packet size, if necessary.
Sybase ASE and Microsoft SQL Server.
Consult your database documentation for information about how to increase the packet size.
For Sybase ASE or Microsoft SQL Server, you must also change the packet size in the relational connection object in the Workflow Manager to reflect the database server packet size.