zlacker

The fintech company I worked at does handle millions of QPS has has thousands of servers. It is on the same order of magnitude or at least 0.1x scale, not to mention the complexity of business logic involving monetary transactions.

If there’s indeed a 5 min lag in monitoring dashboard in Cloudflare, I honestly think that's a pretty big concern.

For example, a simple curl script on your top 100 customers' homepage that runs every 30 seconds would have given the warning and notifications within a minute. If you stagger deployments at 5 minute intervals, you could have identified the issue and initiated the rollback within 2 minutes and completed it within 3 minutes.