High-performance Java Persistence Guide

High-performance Java persistence isn't just about choosing a library; it’s about understanding the entire stack, from the up to high-level frameworks like Hibernate and JPA . To build a system that doesn't "barely crawl" under load, you must master how data moves between your application and the database. 1. Master the Fundamentals: JDBC & Connection Management

Use PreparedStatements to allow the database to cache execution plans. This reduces parsing overhead and protects against SQL injection.

Database connections are expensive to create. Always use a connection pool (like HikariCP ) and monitor it with tools like FlexyPool to find the right pool size.

A common mistake is designing entity mappings based solely on the object model without considering the generated SQL. 14 High-Performance Java Persistence Tips - Vlad Mihalcea

Instead of sending 100 separate INSERT statements, use JDBC batching to send them in a single network round-trip. For Hibernate users, this requires setting hibernate.jdbc.batch_size . 2. Optimize JPA & Hibernate Mapping