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AWS Docs describe Burst Balance and EEBS IO Balance in the following way:

BurstBalance The percent of General Purpose SSD (gp2) burst-bucket I/O credits available.

EBSIOBalance% The percentage of I/O credits remaining in the burst bucket of your RDS database. This metric is available for basic monitoring only. This metric is different from BurstBalance

However, as far as I know, the docs do not explain how those two metrics are different.

Zillo
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  • One is an absolute value, one is a percentage. – Tim Oct 04 '21 at 02:34
  • @Tim They are both percentages as quoted above "BurstBalance The **percent** of General Purpose SSD (gp2) burst-bucket I/O credits available" "EBSIOBalance% The **percentage** of I/O credits remaining in the burst bucket of your RDS database". Indeed we have been recently running out of EBSIOBalance but not of BurstBalance. – Zillo Oct 04 '21 at 13:07
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    (Not to be confused with `EBSByteBalance%`.) – David Winiecki Jan 14 '23 at 21:16

1 Answers1

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BurstBalance is an EC2 / EBS metric (EBS falls under the EC2 namespace). EBSIOBalance% is an RDS metric. Under RDS you can't see the EBS volume burst balance directly which is why RDS has to expose it.

Tim
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