Improve insert performance massively

Question

In my application I need to massively improve insert performance. Example: A file with about 21K records takes over 100 min to insert. There are reasons it can takes some ti

Answer 1

see

spring-data JPA: manual commit transaction and restart new one

Add entityManager.flush() and entityManager.clear() after every n-th call to save() method. If you use hibernate add hibernate.jdbc.batch_size=100 which seems like a reasonable choice.

Performance increase was > 10x, probably close to 100x.