r/u_amit_builds

Most Spring Boot file upload tutorials look fine until you try more than a few users.

In production it’s a different story. Memory spikes, threads blocking, and the app basically choking when multiple large PDFs hit at once.

I stress tested uploads under real load and the “simple” MultipartFile approach starts showing all the ugly edges people skip in tutorials.

Curious what others ended up changing first when they hit upload bottlenecks in Spring Boot?