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Scaling & load balancingMediumSDE-2
Your notification workers autoscale on CPU at 70%, but during a big campaign the queue grows to 5 million messages while CPU stays at 30%. What went wrong and what should you scale on?
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FlipkartSwiggy
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Answer out loud as you would in the room — clarify, give numbers, name the trade-off — then compare with the model answer.
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