Now I have working batch inserts with hibernate ("hibernate.jdbc.batch_size = 50) but as far as i know hibernate generates single inserts in batches. I know that I can tell my db driver to create multi-row insert for every batch of inserts to speed up performance using rewriteBatchedStatements: jdbc:postgresql://localhost:5432/mydb?rewriteBatchedStatements=true
But in db logs there are still single inserts. What am I doing wrong? Thanks.