Jdbc2.0 Weblogic5.1

Question

How is this implementation performing on weblogic?
On Websphere you can guarantee optimized performance when using
PreparedStatements,
no matter if they were created on the connection you hold a reference to, or
on another
connection.
How is the performance using DataSource + preparedStatement compared to a
simple pool,
which initially uses DriverManager, and where you can not use
PreparedStatements?
Best regards
Lars Hansen

Answer 1

No. we won't prime every pooled connection to have an identical prepared statment
to the one you ask for. Only the connection you have will be primed. That would
be much too much overhead. Over time, if that prepared statement is important,
it will have been requested from all or most of the pooled connections, and
will be available for re-use in each of them.
joe
Lars Hansen wrote:
>
Ok. I try again.
My question was regarding to the implementation of the jdbc 2.0 api on the
weblogic5.1 platform.
I want to do the following scenario.(simplified)
//prepare query
Connection c = datasource.getConnction(user,pass);
PreparedStatement ps = c.prepareStatement("select * from employee where
id=?");
ps.setInteger(1,42);
ResultSet rs = ps.executeQuery();
//handle resultset
if(rs.next())
//do stuff
//clean up
rs.close();
ps.close();
c.close();
//later I want to do this again
//prepare another query
Connection c = datasource.getConnction(user,pass);
PreparedStatement ps = c.prepareStatement("select * from employee where
id=?");
ps.setInteger(1,500);
ResultSet rs = ps.executeQuery();
//handle resultset
if(rs.next())
//do stuff
//clean up
rs.close();
ps.close();
c.close();
When doing the second query I will perhaps recieve another Connection than
the first
one. When using Websphere the other connections in the pool will be prepared
with the
statement, so that it is already the second time I use it. Can I expect the
same behavior
from Weblogic? I wasn´t able to find any documentation regarding to the
implementation
/Lars Hansen
"Cameron Purdy" <[email protected]> wrote in message
news:[email protected]...
I don't understand your question at all.
Peace,
Cameron Purdy
Tangosol, Inc.
Clustering Weblogic? You're either using Coherence, or you should be!
Download a Tangosol Coherence eval today at http://www.tangosol.com/
"Lars Hansen" <[email protected]> wrote in message
news:[email protected]...
How is this implementation performing on weblogic?
On Websphere you can guarantee optimized performance when using
PreparedStatements,
no matter if they were created on the connection you hold a reference
to,
or
on another
connection.
How is the performance using DataSource + preparedStatement compared to
a
simple pool,
which initially uses DriverManager, and where you can not use
PreparedStatements?
Best regards
Lars Hansen
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