AWS bill line item
Aurora:ServerlessV2Usage
The per-second (billed hourly) charge for Aurora Capacity Units (ACUs) consumed by an Aurora Serverless v2 instance, where each ACU is roughly 2 GiB of memory plus corresponding CPU and networking.
Aurora Serverless v2 ACU usage
Verified against official AWS documentation last checked
Why it shows up
Serverless v2 autoscales capacity to match load, so a workload with sustained traffic, a query that pins CPU/memory, or a minimum-ACU floor set too high will keep ACU consumption (and this line item) elevated even when the app looks idle.
Because scaling happens continuously and is billed per second, spiky or noisy-neighbor query patterns can drive ACU usage up well beyond what average utilization graphs suggest, making this charge harder to predict than a fixed instance-hour price.
How to cut it
- Lower the minimum ACU floor if it's set higher than the workload's true idle baseline.
- Investigate and tune expensive queries that force scale-ups: missing indexes, full scans.
- Correlate scaling events with specific traffic patterns using database performance metrics.
- Compare against a provisioned Aurora instance if the workload's variability turns out to be low.
How to read a usage type
The colon in Aurora:ServerlessV2Usage doesn't introduce an instance type the way it does in a code like BoxUsage:m5.large. This code carries no region or direction token either, so there's nothing to break down here.
Source
Source: AWS docs →Found Aurora:ServerlessV2Usage on your own bill?
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