The PDF dedicates significant real estate to the lifecycle of a database connection. Key takeaways include:
"High-Performance Java Persistence" by Vlad Mihalcea is a comprehensive guide to optimizing data access layers, bridging the gap between application development and database administration. It covers JDBC connection management, Hibernate tuning, and advanced jOOQ querying to maximize application performance. Learn more about the book at Vlad Mihalcea's website . High-Performance Java Persistence - Amazon.com
This happens when you fetch a list of entities and then issue a separate SQL query for each entity to load its child associations. High-performance Java Persistence.pdf
Fetching and associations
entityManager.createQuery( "update Order o set o.status = :status where o.date < :date") .setParameter("status", Status.CANCELLED) .executeUpdate(); The PDF dedicates significant real estate to the
It is important to note that while many search for free copies, the author (Vlad Mihalcea) actively maintains this as a commercial/paid resource. However, a wealth of information is legally available:
Instrumentation and profiling
: Always default to FetchType.LAZY for all associations ( @ManyToOne , @OneToMany ).
The e-book version is available on and Leanpub in multiple formats, including PDF , EPUB, and MOBI (for Kindle). For the paperback version, it is printed on demand by Amazon and can be purchased on Amazon's regional sites like Amazon.com. Learn more about the book at Vlad Mihalcea's website