Instead of ever being throttled your instance accumulates a "borrowed" CPUSurplusCreditBalance. If your CPU Utilization goes back below the threshold, the earne

Instead of ever being throttled your instance accumulates a "borrowed" CPUSurplusCreditBalance. If your CPU Utilization goes back below the threshold, the earned credits will pay down the surplus balance. If you terminate an instance with a nonzero CPUSurplusCreditBalance you'll be charged for the extra usage. We removed the direct relationship between credits and 24h cycles, so your current usage no longer affects tomorrow's balance: https://forums.aws.amazon.com/ann.jspa?annID=5196 https://forums.aws.amazon.com/ann.jspa?annID=5196