If you are looking for the PDF version of this book, there are several legitimate ways to obtain it:
By utilizing database-specific features like Window Functions or CTEs (Common Table Expressions). vlad mihalcea high-performance java persistence pdf
A particularly valuable section for developers distributing the PDF among teams is the deep dive into connection pooling. Mihalcea explains the physics of database connections—how they are established, why they are expensive, and how tools like HikariCP can be tuned. He moves beyond simple configuration to explain the relationship between connection pool size, database thread counts, and response time percentiles. This technical depth transforms the book from a coding manual into a system architecture guide. If you are looking for the PDF version
This is the meat of the book, focusing on advanced optimization strategies. why they are expensive