Hibernate batch insert, batch update

Question

I have dao which basically inserts a record into a table using hibernate, this dao is marked by @Transactional annotation with propogation-NESTED, and I have service which makes some other stuff and then invokes my dao. My service is also annotated with @Transactional with propagation-REQUIRED.

I call service in a loop. Does my inserts on my dao works in batch or one by one? How can I be sure that they work in batch? Does hibernateTransaction manager manage batch inserts?

I am using Oracle DB.

Answer 1

I have set following property and my performance increased;

hibernate.jdbc.batch_size=50

Answer 2

I am no Hibernate expert but I remember adding a property to log out the sql statements.

     SessionFactory sf = new Configuration()
       .setProperty("hibernate.show_sql", "true")

This should show what sql is being produced after each execution of your method

Answer 3

It will not go in a batch, have a look at Hibernate Doc.

Answer 4

To track if hibernate uses batches you may create logger for org.hibernate.jdbc.AbstractBatcher it will log batcher...