The Autoscaler Was Right and the Capacity Was Four Minutes Late
Every weekday at 09:00 the service sheds requests for three to four minutes: latency climbs to six seconds, a few percent of requests time out, then everything recovers on its own. The autoscaling policy fires correctly every morning and adds the right number of instances. By the time they serve traffic the peak is over. The team has lowered the threshold twice and nothing changed.
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