Daan MeijerandClaude Opus 5.5
508d8b5723
A picture group's batch has 30-55k release keys; an advisory lock each ran Postgres out of shared memory (max_locks_per_transaction), and those batches failed with HTTP 500 (the ranges went back, nothing stored). A chunk only matches releases of its range's group, so one lock per group serializes exactly the writers that could both start an upload. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>