SDO_OCIObjectFree cost much time???

Question

We are developing GIS software based on Oracle 8.16. Our software must operate large volume spatial data(1TB). But Speed is our bottle-neck . For a example:
There are 93664 lines, 1250000 points. Our system take 33 seconds to fetch all of data from Oracle 8.1.6. It is too slow. Because spatial data muse be displayed quickly in GIS.
The server computer:
Dell Poweredge 4400
cpu: P3 933
memory : 1G
and the oracle SGA is enough large.How much time is the normal speed?
When I read spatial geometry object from oracle, the speed is slow. But I read other type data from oracle, the speed is high.
When I read a spatial geometry object from oracle, whether oracle must new a object and I must delete the object? I found that deleting objects cost much time ( 1/4 sum time) . I believe that the process of creating objects also cost much time!?? Mybe it is net-bottle. Has method to resolve is??
the following is my program:
static SDO_GEOMETRY_TYPE *global_geom_obj[ARRAY_SIZE];/* spatial object buffer */
static SDO_GEOMETRY_ind *global_geom_ind[ARRAY_SIZE]; /* Object indicator */
checkerr(errhp, SDO_OCIDefineByPos(stmthp, &defn2p, errhp, (ub4)2,
(dvoid *)0, (sb4)0, SQLT_NTY, (dvoid *)0,
(ub2 *)0, (ub2 *)0, (ub4)OCI_DEFAULT));
checkerr(errhp, SDO_OCIDefineObject(defn2p, errhp, geom_tdo,
(dvoid **)global_geom_obj, (ub4 *)0,
(dvoid **)global_geom_ind, (ub4 *)0));
status = OCIStmtExecute(svchp, stmthp, errhp, (ub4)ARRAY_SIZE, (ub4)0,
(OCISnapshot *)NULL, (OCISnapshot *)NULL,
(ub4)OCI_DEFAULT);
while (has_more_data)
status = OCIStmtFetch(stmthp, errhp, (ub4)ARRAY_SIZE,
(ub2)OCI_FETCH_NEXT, (ub4)OCI_DEFAULT);
// SDO_OCIObjectFree,deleting objects cost much time, the process of oracle creating object also cost much time???????????????????????????????
checkerr(errhp, SDO_OCIObjectFree(envhp, errhp, (dvoid *)global_geom_obj[row], (ub2)OCI_OBJECTFREE_FORCE));
global_geom_obj[row] = NULL;
Does anybody know why and how can I do?
Thanks!

Answer 1

hm, what is codeData? is it possible to post the whole code?
a small test shows that the bottleneck is not in the JTree code:
import javax.swing.*;
import javax.swing.tree.*;
import java.awt.*;
public class TreeTest {
   public static void main(String [] arg) throws Exception {
      long start = System.currentTimeMillis();
      JFrame frame = new JFrame("JTreeTextNodes");
      JTree tree = new JTree();
      DefaultMutableTreeNode root = new DefaultMutableTreeNode("root");
      for(int i=0; i<6000; i++) {
         root.add(new DefaultMutableTreeNode("Node "+i));
      DefaultTreeModel model = new DefaultTreeModel(root);
      tree.setModel(model);
      frame.getContentPane().add(new JScrollPane(tree));
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      frame.pack();
      frame.show();
      System.out.println(System.currentTimeMillis()-start);
}takes less than a second to execute on my machine win2k,1.5Ghz, java 1.4.2
asjf