JPA Archives • my2cents

JPA batch inserts with Hibernate & Spring Data

15th June, 201224th March, 2020 Marcel Stör15 Comments

JPA batch inserts (aka bulk inserts) may seem trivial at first. However, if you’re not careful you won’t see the performance gains you expect even though your application works “just fine”. If you follow the below guidelines your JPA batch inserts should be blazingly fast, though. JPA batch inserts with Hibernate All the material presented […]

Extra lazy one-to-many mapping with Hibernate

21st November, 201019th January, 2013 Marcel Stör1 Comment

Assume entity A has a one-to-many relationship to B. So, you’d have a method like A#getBs(). However, sometimes you might/will only need the number of Bs and not the entities themselves i.e. you need the count. However, if you called A#getBs()#getSize() you’d effectively initialize the collection and thereby loading entities into memory for no reason. […]

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Tag: JPA

JPA batch inserts with Hibernate & Spring Data

Extra lazy one-to-many mapping with Hibernate