Alerts for RDS Allocated Storage above certain threshold


We want to set up an alert for when the allocated storage on an RDS instance breaches a certain threshold due to auto-scaling. However, we cannot find a CloudWatch metric that exposes the current allocated storage. There seems to be only the metric for free storage space.

Could anyone suggest another approach to achieve this?

1 Answer
Accepted Answer

You could trigger a Lambda from RDS DB Instance events for storage modification, then in the Lambda query the DB Instance storage size and either alert to SNS directly from there or write a custom metric value and set up an alarm.

answered a year ago
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reviewed 15 days ago
  • Thanks, yes we will follow this approach by triggering a Lambda function on the RDS-EVENT-0218 (autoscaling completed) event.

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