@Id @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "pooled_lo_gen") @GenericGenerator( name = "pooled_lo_gen", strategy = "org.hibernate.id.enhanced.SequenceStyleGenerator", parameters = { @Parameter(name = "sequence_name", value = "product_seq"), @Parameter(name = "initial_value", value = "1"), @Parameter(name = "increment_size", value = "50"), @Parameter(name = "optimizer", value = "pooled-lo") } ) private Long id; Use code with caution. Optimizing Relationships
Generic dialects do not leverage vendor-specific optimizations, such as PostgreSQL's JSONB data types, Oracle's advanced analytical functions, or SQL Server's bulk insert hints. Master Connection and Transaction Management
The core philosophy of the book is that a high-performance data access layer must be designed in harmony with the underlying database system. It's not just about writing faster code; it's about deeply understanding how your application interacts with the database to avoid common pitfalls. high-performance java persistence pdf 20
The GenerationType.IDENTITY strategy forces Hibernate to execute an immediate SQL INSERT statement to find out the database-assigned ID. This completely breaks write-batching mechanisms.
Explores advanced type-safe querying, including window functions, common table expressions, and stored procedures. Review Summary @Id @GeneratedValue(strategy = GenerationType
: Why most performance issues aren't in the code, but in how the application waits for a database connection. How to Access the Content Official Source : The complete book is available at vladmihalcea.com Free Content
The following performance-boosting techniques are central to the book's philosophy: It's not just about writing faster code; it's
Covers database transaction fundamentals, isolation levels, and scaling strategies like sharding and replication. Teaches efficient mapping of associations and inheritance.
Pessimistic locking assumes conflicts will happen. It uses database-level locks (like SELECT ... FOR UPDATE ).
