Congestion collapse is a situation in large distributed systems when a collection of servers hits roughly 100% CPU utilization yet provides effectively zero productive work. Worse yet, you can’t recover even when systems scale up! In this session, join a discussion of the congestion collapse phenomenon and how it applies to web applications. This session covers how to recover, with an example from Amazon Prime Day. In the second half of the session, the discussion shifts to the AWS tools you can use to test for congestion collapse proactively and how to avoid related outages in your systems.
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