Vlad Mihalcea High-performance Java Persistence Pdf

Vlad Mihalcea offers the book directly on his site (vladmihalcea.com). Purchasing here often includes access to the High-Performance Java Persistence Video Courses , which complement the text.

Before diving into the book itself, it is crucial to understand the pedigree of its author. is a Java Champion and one of the top Hibernate ORM project committers . In addition to authoring this book, he created Hypersistence Optimizer , a tool that scans your application configuration and mappings to automatically identify performance issues in your data access layer. His expertise is built on years of real-world experience and thousands of hours of low-level investigation into how Hibernate, JPA, and database drivers behave under load. He runs a wildly popular blog (active since 2013) where he shares deep dives into Java, JPA, Hibernate, Spring, SQL, and database systems like Oracle, SQL Server, PostgreSQL, and MySQL. In short, when Vlad Mihalcea writes a book about database performance, the Java community pays attention.

query problem using join fetches, entity graphs, and DTO projections.

1 — The fundamental mindset: databases are precious metal vlad mihalcea high-performance java persistence pdf

How and when Hibernate synchronizes in-memory changes with the database. 3. Advanced Performance Optimizations

The book is structured into three main parts to cover the entire data knowledge stack:

Implementing Hibernate Second-Level Caching (ReadOnly, NonStrictReadWrite, ReadWrite, Transactional) with providers like Ehcache or Hazelcast. Vlad Mihalcea offers the book directly on his

Unidirectional @OneToMany associations create inefficient junction tables and generate redundant update statements.

Why SEQUENCE and TABLE generators outperform IDENTITY when write-batching is required.

| Problem | Solution from the Book | |---------|------------------------| | Slow pagination | Keyset pagination (seek method) | | N+1 queries | JOIN FETCH or @EntityGraph | | High transaction latency | Reduce flush mode, batch writes | | Stale data errors | Add @Version and retry logic | | Excessive UPDATE statements | Use dynamic updates ( @SQLUpdate ) | | Second-level cache thrashing | Tune eviction policy & region size | is a Java Champion and one of the

The book is meticulously structured into three primary parts, moving from low-level database fundamentals to advanced JPA and Hibernate optimizations. 1. JDBC and Database Essentials

6 — Query discipline and SQL mastery

The "High-Performance Java Persistence" PDF is structured to guide you through the anatomy of a fast data layer. Here are the five pillars the book focuses on.

The text bridges the gap between Java application logic and database internals. It argues against relying blindly on framework automation. Instead, it advocates for a symbiotic approach where Hibernate or JPA is used for write-heavy, transactional state mutations, while raw SQL, JDBC, or jOOQ is utilized for complex, read-only data querying. Key Concepts and Architectural Breakthroughs