JDBC Performance Issue

Question

I am making call to Oracle Stored Proc on remote database .
The values are taken in result set.The numbers of records in result set are aroung 6000.
when I do
while(rs.next())
//My logic
This takes aroung 5 min(300 sec) to get completed
Now I commented all my logic inside while loop of rs.next()
then also its taking around 4 min (250 sec) to just loop through records.
Is there any way I can minize my time to just loop through records.
I am using oracle thin driver to make connection.
The Strored Proc takes just .05 sec for processing.
Its while(rs.next()) loop where the problem actually is.
After commenting all the programming logic I could gain only 0.5 sec.
Is there something I could do on this

Answer 1

I am making call to Oracle Stored Proc on remote
database .
The values are taken in result set.The numbers of
records in result set are aroung 6000.
when I do
while(rs.next())
//My logic
This takes aroung 5 min(300 sec) to get completed
Now I commented all my logic inside while loop of
rs.next()
then also its taking around 4 min (250 sec) to just
loop through records.
Is there any way I can minize my time to just loop
through records.
I am using oracle thin driver to make connection.
The Strored Proc takes just .05 sec for processing.
Its while(rs.next()) loop where the problem actually
is.
After commenting all the programming logic I could
gain only 0.5 sec.
Is there something I could do on thisProblem is in simple fact that Oracle's jdbc is buffering all records you've selected and when you goes step by step it buffers and buffers again and again. To make sure that all your records are buffered once and forever I would advice to call:
rs.first();
rs.last();To do that u have to create scrollable resultset like:
       Statement stmt = con.createStatement(
                                      ResultSet.TYPE_SCROLL_INSENSITIVE,
                                      ResultSet.CONCUR_UPDATABLE);
       ResultSet rs = stmt.executeQuery("SELECT a, b FROM TABLE2");
       // rs will be scrollable, will not show changes made by others,
       // and will be updatableand then loop through all your records
Another approach is to use fetching (chunking) facility Statement.setFetchSize() and Statement.setFetchDirection() sometimes it also helps
Pavel