Uploaded March 2026 | Updated September 2026, 2 weeks ago
#VoxxedDaysCERN26
JPA makes database interaction feel almost magical—until your app grinds to a halt. In this talk, we’ll take a tour through the common (and not-so-common) performance pitfalls that turn object-relational mapping into an object-relational mess. From data loading surprises to connection mismanagement, we’ll explore real-world issues using a sample app: the FunFactStore, where fun facts are sold, but bugs are free.
We’ll dig into how seemingly harmless libraries can sometimes do more harm than good, and how tooling can help you spot trouble before your users do. Whether you’re using Spring Data JPA, navigating tricky transaction boundaries, or just wondering why things suddenly got slow, this session offers practical insights—and maybe a few fun facts.
#VoxxedDaysCERN26
JPA makes database interaction feel almost magical—until your app grinds to a halt. In this talk, we’ll take a tour through the common (and not-so-common) performance pitfalls that turn object-relational mapping into an object-relational mess. From data loading surprises to connection mismanagement, we’ll explore real-world issues using a sample app: the FunFactStore, where fun facts are sold, but bugs are free.
We’ll dig into how seemingly harmless libraries can sometimes do more harm than good, and how tooling can help you spot trouble before your users do. Whether you’re using Spring Data JPA, navigating tricky transaction boundaries, or just wondering why things suddenly got slow, this session offers practical insights—and maybe a few fun facts.
![[VDBUH2026] Julien Topçu - Hexagonal Architecture in Practice](https://i.ytimg.com/vi/QZrl5tghsTA/mqdefault.jpg "[VDBUH2026] Julien Topçu - Hexagonal Architecture in Practice
There always comes a point where software becomes so complex and old that it becomes unmaintainable. Updating the technical stack without breaking everything becomes impossible, implementing new features takes longer, and the technical debt is so overwhelming that refactoring becomes exorbitant.
What if we told you that all of this is more of a practice problem than a software aging problem?
Come and discover through hands-on experience in this 100% live coding session how Hexagonal Architecture can tackle software complexity, making it possible for you to be adaptable and sustainable while helping you manage your technical debt more effectively.")
