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MKMagnus Karlssonblog.ioop.seMay 29 · 11 min read

The Case of the Bloating Database: Solving the PostgreSQL Large Object Leak

A while ago, a former client asked me to have a look at their PostgreSQL database that had swollen to nearly 30 GB on disk when the actual data should have needed far less space. What began as a quick

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ESEKASPREET SINGH ATWALekas-7.hashnode.devMar 16 · 3 min read

Concurrency Without the Chaos

In a world where high-traffic applications are the norm, data integrity is everything. Take, for example, two travel agents simultaneously booking the last available seat on a flight at the same milli

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TTuanhdotnettuanhnet.hashnode.devMar 7 · 11 min read

Strategies: How to Migrate Legacy Java Systems to Spring and Get Transactions Right

Source: Strategies: How to Migrate Legacy Java Systems to Spring and Get Transactions Right 1. Why transaction bugs show up after the migration (and not during the demo) Most legacy Java systems don’t fail loudly when transactions are wrong. T...

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NSNuno Silvaedge-case.hashnode.devFeb 20 · 14 min read

Precision Data Access in Spring Data JPA: A Guide to Projections

As an application matures, its domain model inevitably grows heavier. What started as a simple Order entity evolves into a dense, interconnected graph of LineItem, CustomerProfile, PaymentHistory, and

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NSNuno Silvaedge-case.hashnode.devFeb 19 · 12 min read

The N+1 Problem in Spring Data JPA: A Practical Guide

Spring Data JPA solves a real problem. It lets you model your domain as an object graph and persist it to a relational store without hand-writing every SQL statement. For writes, this is largely a goo

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APAbheeshta Pabheeshta-java.hashnode.devFeb 12 · 3 min read

Java Series #17: Spring Boot Essentials- Annotations, Validation & Transactions

Spring Boot looks simple on the surface — just add a dependency, write a controller, and run. But behind that simplicity is a powerful architecture built on IoC, auto-configuration, validation, and transaction management. 1️⃣ @SpringBootApplication –...

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TTuanhdotnettuanhnet.hashnode.devFeb 9 · 10 min read

Series of Backend Developer Interview Questions Part 8

Source: Series of Backend Developer Interview Questions Part 8 1. Question 1: When should you use EntityGraph instead of fetch join? If you’ve ever written a JPQL join fetch and felt like a hero… until pagination exploded or Hibernate started ...

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PCPratik Chandlekarpratik280.hashnode.devJan 17 · 3 min read

Production-Grade Spring Boot APIs — Part 1: Web, JPA & What Really Happens at Startup

Most Spring Boot tutorials teach you how to build an API.Very few explain what actually happens when a production Spring Boot application starts — and why those internals matter when systems grow. This article documents how we actually understand and...

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AAAlhmedat Akthamalhomaidat.hashnode.devJan 16 · 3 min read

Why mappedBy Matters More Than You Think

You've probably seen JPA tutorials that mention mappedBy, tried your code without it, watched it work perfectly fine, and thought: "Why bother?" I get it. The relationship looks correct. The data saves. Everything seems fine. But here's the thing wha...

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JDJosé Díazblog.joedayz.peDec 24, 2025 · 5 min read

Quarkus Panache: Simplificando el Acceso a Datos

Introducción Quarkus Panache es una extensión que simplifica el acceso a datos con Hibernate ORM. Proporciona dos patrones de programación que reducen significativamente el código boilerplate necesario para operaciones de base de datos. ¿Qué es Panac...

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Trending tags this week

The Case of the Bloating Database: Solving the PostgreSQL Large Object Leak

Concurrency Without the Chaos

Strategies: How to Migrate Legacy Java Systems to Spring and Get Transactions Right

Precision Data Access in Spring Data JPA: A Guide to Projections

The N+1 Problem in Spring Data JPA: A Practical Guide

Java Series #17: Spring Boot Essentials- Annotations, Validation & Transactions

Series of Backend Developer Interview Questions Part 8

Production-Grade Spring Boot APIs — Part 1: Web, JPA & What Really Happens at Startup

Why mappedBy Matters More Than You Think

Quarkus Panache: Simplificando el Acceso a Datos