Case studies and notes from building production systems.https://abdelwahab.dev/https://abdelwahab.dev/blog/aurora/https://abdelwahab.dev/blog/aurora/One status broadcast ran 1,013 queries and pinned Aurora at 100% CPU. The fix was not an index. EXPLAIN showed each call scanning 7.33M rows.Mon, 05 Oct 2026 00:00:00 GMThttps://abdelwahab.dev/blog/engine/https://abdelwahab.dev/blog/engine/Rate limits caused 65% of review failures. Treating them as "retry later" stopped provider outages from becoming ours.Mon, 05 Oct 2026 00:00:00 GMThttps://abdelwahab.dev/blog/fargate/https://abdelwahab.dev/blog/fargate/ECS scale-in was killing 2-hour translation jobs. So workers drain before they stop.Mon, 05 Oct 2026 00:00:00 GMThttps://abdelwahab.dev/blog/triage/https://abdelwahab.dev/blog/triage/Almost trusted a plausible explanation. So pass/fail had to live in tested code.Mon, 05 Oct 2026 00:00:00 GMT