Sun Application Server Web Service Performance Issue

I am prototyping a Web Service application using SUN Application Server 9 bundled with Netbeans IDE. I found that the performance of uploading a record from a client to server is dropped dramatically when the size of the record increases. There is no communication issue because both the client and server run on same local machine. A 3M record takes about 3-5 minutes to upload. Is there any way to tune the Application Server for better performance? Please advice.

[473 byte] By [pswang8a] at [2007-11-26 19:31:13]