Score:4

AWS: What is the difference between Burst Balance and EBS IO Balance metrics?

de flag

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.

Tim avatar
gp flag
Tim
One is an absolute value, one is a percentage.
de flag
@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.
David Winiecki avatar
cn flag
(Not to be confused with `EBSByteBalance%`.)
Score:1
gp flag
Tim

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.

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