The book is structured into sections that take the reader from foundational database knowledge to advanced framework tuning. High-Performance Java Persistence: Mihalcea, Vlad
The logs scrolled by. Instead of 201 queries, there were 3. Instead of 4.2 seconds, the history page loaded in 89 milliseconds. The lock exceptions vanished. The database CPU, which had been pegged at 100%, dropped to 3%. High-performance Java Persistence.pdf