Hi Don,
OJB does nothing special if you are running it in a managed environment.
So IMO the overhead you see must be J2EE overhead.
I expect that you will see a drastic improvement if you just use a
(stateless) SessionBean and not BMP entity beans.
EntityBeans require *a lot* of management overhead.
Proper usage of transaction demarcation with entity beans also has an
enourmous impact!
So in OJB.properties you should switch to container managed connections!
cheers,
Thomas
-Original Message-
From: Don Walling [mailto:[EMAIL PROTECTED]
Sent: Tuesday, March 11, 2003 11:58 PM
To: OJB Users List
Subject: Re: speed question
Its the average time. The first time takes close to 2 seconds.
I'm not so worried about the absolute value of the time. Its the
relative difference when we put the code inside an EJB that is
bothersome. Just wondering if there is something we're
missing regarding
configuration, or if we can reasonably expect the timings to
be similar.
Thanks for your help,
Don
---
[EMAIL PROTECTED] wrote:
Is 450ms the average time it takes or is it the first time
the ejb container
takes a request?
Jeff
On Tuesday 11 March 2003 09:44 am, you wrote:
We're experiencing a speed difference we can't explain.
We've tried the
following code in two circumstances:
Date start = new Date();
PersistenceManager manager = factory.getPersistenceManager();
PersistenceBrokerFactory.defaultPersistenceBroker().clearCache();
manager.currentTransaction().begin();
String filter = registrationNumber == 2;
Query query = manager.newQuery(AircraftValue.class,filter);
Collection all = (Collection)query.execute();
Interator result = all.iterator();
Date end = new Date();
When packaged in a .war and invoked by a .jsp, the code executes in
about 15 ms. When packaged in an ejbLoad() method on a BMP, it takes
about 450 ms. The OJB.properties and registry.xml files are
identical in
both cases (copied from OJB 0.9.9), and we're using a
datasource to SQL
Server. Is this speed difference resulting from being
executed inside a
BMP transaction? Or is something else going on?
Thanks in advance,
Don
---
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