Persisting a List

[Jason Ferguson]

I'm using this method in a Repository class and was wondering if
someone could do a quick sanity check on it:

    @Transactional
    public void persistList(List<BorderPoint> objectList) throws
RepositoryException {

        EntityManager em = entityManagerFactory.createEntityManager();

        try {
            em.getTransaction().begin();
            int i = 1;
            for (BorderPoint bp : objectList) {
                em.persist(bp);
                if (i % 100 == 0) {
                    em.flush();
                    em.clear();
                }
                i++;
            }
            em.getTransaction().commit();
        } catch (EntityExistsException ex) {
            // need to log this somehow
            //log.warning("persist() threw EntityExistsException: " +
ex.getMessage());
            ex.printStackTrace();
            throw new RepositoryException(ex);
        }
        catch (Exception e) {
            e.printStackTrace();
        } finally {
            em.close();
        }
    }

I'm using it to persist data to a table that is quite large, and
performance seemed to degrade quickly when the table hit 3M rows.
Currently, I'm using MySQL with InnoDB tables.

Jason