ManyToOne « Batch « JPA Q&A

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1. JPA/Eclipselink poor performance batch update entity on ManyToOne relationship changes    stackoverflow.com

I have problem with batch writing in eclipselink when i update an entity properties which link to other entity. I have a Cardholder entity with @ManyToOne relationship with Card Entity. 

@Entity
@Table(name = "...")
@NamedQueries({...})
public ...