It wasn't Nginx, it was Minio.
@sjw@neckbeard.xyz have you ever had issues with Minio cache using up all the inodes?
@mewmew @sjw@neckbeard.xyz Do you cache files after 1 access?
@mewmew
Minio itself can cache files for faster access in a different location, for example NVME drive.
@sjw@neckbeard.xyz
Bruh
https://github.com/minio/minio/issues/10268