RE: Bea WebLogic and Oracle shared server
- From: "Michael Fontana" <mfontana@xxxxxxxxx>
- To: <oracle-l@xxxxxxxxxxxxx>
- Date: Mon, 7 Jun 2004 16:01:17 -0500
We also use BEA connection pooling. One of our developers figured out
how to do it after I complained about the number of connections it was
generating. Keep in mind also that several versions and interrations of
BEA weblogic and (worse yet) it's API will open cursors in java without
explicitly closing them. Be prepared to train your development
community to be sure all cursors are closed.
It's not immediately apparent this is happening until you have a
production issue, of course....
Michael Fontana
Sr. DBA
NTT/Verio
-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Carel-Jan Engel
Sent: Monday, June 07, 2004 6:17 AM
To: oracle-l@xxxxxxxxxxxxx
Subject: Re: Bea WebLogic and Oracle shared server
> BEA opens a fixed
> number of connections (Thin JDBC) to our Oracle database. Right now,
> Oracle is running in dedicated server mode. But since the number
> of users is going to double, the number of BEA connections is going to
> double as well (from 250 to over 500). This would lead to an increase
in
> shard server processes to over 500 as well.
Helmut,
AFAIK, BEA is doing connection pooling on its own. At the sites I've
seen, fixed number of connections is (much) lower than the number of
concurrent users. If that's the case in your situation as well, I would
suggest not to double the number of BEA connections, and let BEA do the
connectionsharing. At least test the performance issues of stacking two
multiplexing architectures, BEA connectionpooling on top of MTS. Given
200 users, a test could be 200 BEA connections and 100 shared server
processes. Other configurations to test: 100 BEA connections and 100
dedicated processes, and 100 BEA connections with 50 shared processes.
So you can find out which one is the most efficient. If you are going to
perform such a test, I'm curious about the results. Alas, I don't have
access to a proper testenvironment on this topic now.
Regards, Carel-Jan
===
If you think education is expensive, try ignorance. (Derek Bok) ===
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