I've been reading some EBS docs

and they are talking about "I/O credit balance" How can I view my current (or historical) credit balance?

Each volume receives an initial I/O credit balance of 5,400,000 I/O credits, which is enough to sustain the maximum burst performance of 3,000 IOPS for 30 minutes. This initial credit balance is designed to provide a fast initial boot cycle for boot volumes and to provide a good bootstrapping experience for other applications. Volumes earn I/O credits every second at a base performance rate of 3 IOPS per GiB of volume size. For example, a 100 GiB General Purpose (SSD) volume has a base performance of 300 IOPS.


2 Answers 2


AWS recently added Burst Balance metric to monitor your balance, the metrics is 0-100% and says how far is your volume from 5.4 million.

The AWS Blog post about it

This is available for EC2 gp2 Volumes as well as RDS gp2 Volumes.

To view it for EC2 EBS Volumes, go to Cloudwatch -> Metrics -> EBS -> BurstBalance.

To view it for RDS Instances, go to Cloudwatch -> Metrics -> RDS -> BurstBalance.

  • 1
    Where can I find it? I don't see such metric in Browser Metrics list
    – simPod
    Mar 30, 2017 at 17:17
  • 2
    Ok, I just realised I need it for RDS. It's available only for EC2
    – simPod
    Mar 30, 2017 at 17:45
  • Nice tip. This should be available from RDS monitor console too.
    – Rafael
    Jan 7, 2020 at 18:32
  • the correct metric is EBSIOBalance%
    – brauliobo
    Sep 9, 2022 at 22:06

You can't. As in the link provided by AgDude:

From Nov 5, 2014:

Unfortunately there isn't a Cloudwatch Metric for the current IOPS Credit balance like there is with the CPU credits but I am definitely submitting a feature request through to our EBS/Cloudwatch teams for such a metric.

Up to now, Nov 2, 2015, this feature was not implemented yet.

  • This answer was correct as of writing, but is now replaced by @Darek 's answer below
    – Mike Graf
    Nov 15, 2016 at 17:53

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