AWS CPU Credit
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A AWS CPU Credit is a virtual computing resource allocation mechanism used by AWS to manage the CPU usage of burstable performance instances.
- Context:
- It can allow an instance to perform at 100% CPU utilization for one minute per credit.
- It can (typically) be earned at a steady rate when the instance operates below its baseline performance level, and spent when the instance needs to burst above that level.
- It can (often) have its balance monitored through Amazon CloudWatch, enabling users to manage and optimize their instances' performance and cost.
- It can offer a feature known as "Unlimited mode," which allows instances to continue to burst above their baseline CPU utilization level even after their CPU credit balance is depleted, for an additional charge.
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- Example(s):
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- Counter-Example(s):
- A fixed performance instance, such as an M5 or C5, which does not use CPU credits because it offers consistent CPU performance without the ability to burst.
- See: EC2 CPU, EC2 Instance Type, Amazon CloudWatch, CPU Utilization, Burstable Performance Instances.