Used with General Purpose SSD (gp2), Throughput Optimized HDD (st1), and Cold HDD (sc1)
volumes only. Provides information about the percentage of I/O credits (for gp2) or
throughput credits (for st1 and sc1) remaining in the burst bucket. Data is reported to
CloudWatch only when the volume is active. If the volume is not attached, no data is
reported.
The Sum statistic on this metric is not relevant for volumes attached to Nitro-based
instances.
For a volume 1 TiB or larger, baseline performance is higher than maximum burst performance,
so I/O credits are never spent. If the volume is attached to a Nitro-based instance, the
burst balance is not reported. For a non-Nitro-based instance, the reported burst balance is
100%.
Used with General Purpose SSD (gp2), Throughput Optimized HDD (st1), and Cold HDD (sc1) volumes only. Provides information about the percentage of I/O credits (for gp2) or throughput credits (for st1 and sc1) remaining in the burst bucket. Data is reported to CloudWatch only when the volume is active. If the volume is not attached, no data is reported.
The Sum statistic on this metric is not relevant for volumes attached to Nitro-based instances.
For a volume 1 TiB or larger, baseline performance is higher than maximum burst performance, so I/O credits are never spent. If the volume is attached to a Nitro-based instance, the burst balance is not reported. For a non-Nitro-based instance, the reported burst balance is 100%.
Units: Percent