RE: WebLogic, Oracle JDBC related

Suzy,

You said "The app java code should be managing the allocation and release of connections within the pool". Do not know anything about connection pool, so this might be a naive question: It seems to me that it is not a good set up if the applications have to do the pool managing themselved; why can't WL do the pool managing itself?

Long

-----Original Message-----
Sent: Friday, 28 June 2002 3:03 AM
To: Multiple recipients of list ORACLE-L

I'm really rusty on this topic, but...

Connection pooling is configured in weblogic.properties, and would look something like this:

weblogic.jdbc.connectionPool.xxxxxxxx=\

        url=jdbc:oracle:thin:@hostname:port:db_name,\
        driver=oracle.jdbc.driver.OracleDriver,\
        initialCapacity=2,\
        maxCapacity=10,\
        capacityIncrement=1,\
        props=user=xxxx;password=xxxx;weblogic.codeset=UTF-8

Tuning of parameters initialCapacity, maxCapacity, capacityIncrement are key. Here's some info for WL 4.5 (you might instead need to search for 6.x docs):

http://www.weblogic.com/docs45/admindocs/properties.html#conpools http://www.weblogic.com/docs45/techdeploy/jdbcperf.html

The app java code should be managing the allocation and release of connections within the pool. It might be this isn't being done properly within the vendor's code. Or maybe initialCapacity isn't set high enough for the application, which is allocated when WL is initially started, then incremented as-needed as set by capacityIncrement.

Checking v$session for how many connections are created when WL is started, then monitoring it during application use might help lead you to an answer.

Suzy

"Deshpande, Kirti" wrote:
>
> We are in the process of rolling out a Web Appl that uses BEA WebLogic and
> Oracle JDBC, thin driver calls to connect to database. These are dedicated
> connections (No MTS). The listener is overwhelmed with connection requests
> that at times reach 250+ per second. The 'preferred vendor' is blaming it on
> the limitation of the Listener, that is not capable of handling this load.
>
> I suspect this fine piece of software is not using JDBC connection pooling.
> Is there any way to find out if that's indeed the case? I am not involved in
> this project, and may not get access to the Appl Code. A co-worker is asking
> me all kinds of questions about Listener problems. The Vendor is suggesting
> to increase the QueueSize for the listener. They have already created
> multiple listeners in vain.
>
> I think the Appl code is to blame. I do not know much about Java/EJB etc..
> but my hunch is that this EJB container stuff does not smell good. For all I
> know it could be making a db connection for every single thing and
> disconnecting.
>
> Anyone dealt with similar issues?
> All tips are welcome and appreciated.
>
> All right, the preferred vendor is AMDOCS. Anyone running any of their Web
> Applications? If so, can you please contact me off-list?
>
> Thanks.
>
> - Kirti
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.com
> --
> Author: Deshpande, Kirti
> INET: kirti.deshpande_at_verizon.com
>
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