https://osmangoninahid.github.io/tags/postgres/Recent content in Postgres on Osman Goni NahidHugoen-USSat, 19 Sep 2026 00:00:00 +0400https://osmangoninahid.github.io/kb-file-delete-race-and-pool-deadlock/Sat, 19 Sep 2026 00:00:00 +0400https://osmangoninahid.github.io/kb-file-delete-race-and-pool-deadlock/<p>A teammate on our platform team shipped a fix I read closely, because it packs three concurrency lessons into one day of commits. The feature is a knowledge base: users upload files into folders, we extract text from each file, and we index that text into a vector store for search. It worked, but three things were wrong once real traffic hit it: deleting a file left empty folders behind, a delete racing an extraction could resurrect a folder with no database row, and a bulk upload could deadlock the database connection pool.</p>