Hi,
On Wed, Mar 19, 2008 at 9:23 PM, wang yu <[EMAIL PROTECTED]> wrote:
> the problem is resolved.
Can you post how the problem was resolved? Even if it was a "user error",
others on the list may learn from it.
Thanks,
Kevin
>
> On Fri, Mar 14, 2008 at 11:03 AM, wang yu <[EMAIL PROTECTED]> wrote:
>
> > Hello,
> > I met one performance issue with apache-openjpa-1.0.2.
> > My environment includes apache-openjpa-1.0.2,db-derby-10.3.2.1-bin,and
> > apache-tomcat-5.5.26.
> >
> > Below is the openjpa-related properties defined in the persistnce.xml:
> > <property name="openjpa.ConnectionDriverName" value="
> > org.apache.derby.jdbc.ClientDriver"/>
> > <property name="openjpa.ConnectionURL"
> > value="jdbc:derby://localhost:1527/tsam20-database;create=true"/>
> > <property name="openjpa.ConnectionUserName" value="app"/>
> > <property name="openjpa.ConnectionPassword" value="app"/>
> > <property name="openjpa.jdbc.SynchronizeMappings"
> > value="buildSchema"/>
> > <property name="openjpa.Log"
> value="DefaultLevel=WARN,SQL=TRACE"/>
> >
> > And there is my main testing code:
> > EntityManagerFactory factory = (EntityManagerFactory)
> > servlet_context.getAttribute("FACTORY");
> > EntityManager em = null;
> > try {
> > em = factory.createEntityManager();
> > for (int i = 0; i < 1000000; i++) {
> > em.getTransaction().begin();
> > for (int j = 0; j < 100; j++) {
> > MyMessage m = new MyMessage("Hello Persistence!"+j);
> > em.persist(m);
> > }
> > System.out.print("#");
> > em.getTransaction().commit();
> > em.clear();
> > }
> > } catch (Exception e) {
> > if (em != null)
> > em.getTransaction().rollback();
> > e.printStackTrace();
> > } finally {
> > em.close();
> > }
> >
> > I noticed if I run openjpa in a j2se env, the performance is very good
> and
> > keeps steady for long time.
> >
> > But If I run openjpa persisting in a tomcat container, the performance
> > degrades after half an hour and the java process will be totally
> "fronzen"
> > after one or two hour.
> >
> > Does anybody have ideas about this issue? If there's some tips about how
> > to use openjpa in a j2ee application? Or, I should use a more
> > enterprise-grade DB server like oracle?
> >
> > Regards,
> > Yu Wong
> >
> >
> >
> >
> >
>
