Performance degradation in j2sdk1.4 than jdk1.3 for jdbc with oracle

Question

Hi All
I am working on performance issues regarding response time . i have upgraded my system from jdk1.3 to j2sdk1.4 . I was expecting the performance gain in terms of response time in j2sdk1.4. but to my surprise it shows varied results with my application. it shows that j2sdk1.4 is taking higher time for executing the application when it has to deal with database. I am using oracle 9i as the backend database server.
if any body has the idea about, why j2sdk1.4 is showing higher responce time while interacting with database as compare to jdk1.3. then do let me know this.
Thanx in advance

Answer 1

I'm not sure about the error you're getting, but you might want to try a few things:
1) Try the thin driver instead of the oci driver. The thin driver is all java, while the oci requires an Oracle client installation (which might be why your getting the memory error). I think the only programming difference is the URL, so if you need to switch later it should be relatively easy.
2) Instead of DriverManager.registerDriver(), try Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();
3) I know this sounds bad, but try throwing some print statements in to see how far you're getting.
Here a quick sample. And remember to include the classes111.zip in your classpath.
import java.sql.*;
public class OracleTest {
  public static void main(String args[]) {
    try {
      Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();
      Connection c = DriverManager.getConnection(
                  "jdbc:oracle:thin:@localhost:1521:orcl","scott","tiger");
      System.out.println("Got connection.");     
      c.close();
   } catch (Exception e) {
      System.out.println("Error: " + e);