What Problems Do Queues Solve?

Queues solve decoupling (producers don’t need consumers online), buffering (burst absorption), load leveling (steady processing), retry (recover from transient failures), and fan-out (publish once, deliver to many subscriptions). These patterns underpin microservices and serverless systems.

They also help with backpressure: when consumers lag, the queue grows—signaling you to scale workers or throttle producers.