@Id @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "pooled") @GenericGenerator( name = "pooled", strategy = "org.hibernate.id.enhanced.SequenceStyleGenerator", parameters = @Parameter(name = "sequence_name", value = "order_seq"), @Parameter(name = "initial_value", value = "1"), @Parameter(name = "increment_size", value = "20"), @Parameter(name = "optimizer", value = "pooled-lo") ) private Long id; Use code with caution. Relationship Fetch Types
: Bi-directional @OneToOne relationships cannot be lazily fetched when relying on standard proxy mechanisms without enabling bytecode enhancement. The parent entity must execute a query to check for the existence of the child record, leading to N+1 query issues. Prefer unidirectional mappings or replace them with a shared primary key strategy.
: Explores type-safe querying, common table expressions (CTEs), window functions, and database-specific procedures. Key Performance Strategies high-performance java persistence pdf 20
: Prevent request backlogs by keeping connection timeouts low (e.g., 250–500ms) so failure occurs fast during heavy traffic spikes. JDBC Batch Updates
Database connections are expensive to create and tear down. Efficient connection management is the foundational layer of a high-performance persistence architecture. Proper Pool Sizing @Id @GeneratedValue(strategy = GenerationType
Kept equal to maximumPoolSize to eliminate pool resizing overhead during peak traffic.
If two transactions attempt to update the same record concurrently, the first transaction succeeds, while the second encounters an OptimisticLockException . Pessimistic Locking Prefer unidirectional mappings or replace them with a
Pool Size=(Core Count×2)+Effective Spindle CountPool Size equals open paren Core Count cross 2 close paren plus Effective Spindle Count
Ensure your persistence layer is production-ready by verifying the following configurations:
Design indexes to match the exact filter and sort criteria of your application's most critical read queries. Transaction Management and Connection Pooling