hsqldb « EntityManager « JPA Q&A

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1. Persistence.createEntityManager() painfully slow with Hibernate    stackoverflow.com

I'm having huge performance issues with my Eclipse RCP application, apparently caused by Hibernate. To be more specific, the application takes extremely long to start up (up to 2 minutes) - ...

2. EntityManager doesn't refresh the data after querying    stackoverflow.com

My current project uses HSQLDB2.0 and JPA2.0 . The scenario is : I query DB to get list of contactDetails of person. I delete single contactInfo at UI but do not save ...

3. EntityManager does not write to database    stackoverflow.com

i just set up a so far still quite minimal project maven/jpa/hibernate project, where i am trying to persist an object. My class is a quite simple one: 

@Entity
public class Person {
  ...