👀 Views: 338 💬 Answers: 1 📅 Created: 2025-09-24

java postgresql spring-data-jpa accessibility performance Java

This might be a silly question, but Currently developing an application that enhances accessibility features, I've noticed that certain database queries are taking much longer than expected, especially when fetching records with specific filters. The application utilizes Spring Data JPA with PostgreSQL. We're aiming for both performance improvements and compliance with accessibility standards in our data handling. For example, when querying for user data with specific roles, the following code snippet is particularly slow: ```java @Query("SELECT u FROM User u WHERE u.role = :role") List<User> findUsersByRole(@Param("role") String role); ``` This query results in noticeable delays, particularly as the user base grows. I've attempted several optimization strategies already. First, I added an index on the `role` column, which improved performance slightly. Still, it doesn't feel adequate for our needs. Next, I tried using a native query instead: ```java @Query(value = "SELECT * FROM users WHERE role = :role", nativeQuery = true) List<User> findUsersByRoleNative(@Param("role") String role); ``` This approach yielded marginally better results, but I suspect there may be more effective solutions, especially concerning how we handle pagination and large datasets. In addition, I've considered batch fetching instead of lazy loading, as we have multiple related entities that can bulk up the load time. I've implemented it with: ```java @EntityGraph(attributePaths = {"roles", "permissions"}) List<User> findAllWithRolesAndPermissions(); ``` However, the performance still does not meet our accessibility goals, particularly when users require real-time data retrieval. I've checked our database and server configurations, and while they are within the recommended limits, I wonder if there's something I'm overlooking. Any insights on optimizing this query or improving data fetch strategies would be invaluable. Are there specific patterns or practices in JPA that could yield better performance while ensuring our application is accessible? For context: I'm using Java on macOS.