Nightly job builds a usage digest and emails about 300 accounts. A customer wrote in asking why she had not had one "in a while". It last ran 23 days ago. There is no failure. No red X, no error, nothing in the run…
Consumer inserts an invoice row, then emails a receipt. The payment provider redelivered once which is their documented behaviour and entirely my problem to handle my insert hit the unique constraint, the handler threw,…
Deployed at 14:02. By 14:05 was 2,300 and climbing while sat perfectly still. Jobs are image processing, 40 90 seconds each. is the default 30000, 5, managed Redis. Logs show a job starting, then the same job id…
Side project. About 200 jobs a day, mostly outbound webhooks to customers' own endpoints. Every architecture diagram I read has a dead letter queue in it and I cannot tell whether that is for me or for people doing…
Reminder feature. User picks a time, we send a push. Roughly 5,000 a day spread over 24 hours, and they can be edited or cancelled right up to the moment they fire. Option A: a Durable Object per user holding an alarm…
One $12 VPS, Postgres on the same box, a Node app. About 20 jobs a minute: thumbnails, transactional email, a nightly export. No spikes worth the name. Everything I read says use Redis. Redis means another process to…