Need help to identify Cloud Spanner charges on our billing account

Google Cloud Database
1

Dear Community,

Can you help us trying to find out why our account has Cloud Spanner charges, but we don’t have any Spanner service in use. Today a new charge appeared for around US$20 in our account, and it appears on billing but If we search on the Spanner tab for services, we don’t have any active, and also we never have used Spanner before.

Have you any of you experienced this issue before?

Best,

Carlos.

4

Hey @Carlos_AcelerAi,

Do you use Vertex AI RAG Engine? If so, it could be where those mystery charges are coming from.

  • Vertex AI RAG Engine uses a Cloud Spanner database under the hood to manage its data. This is called RagManagedDb.
  • This Spanner instance lives in a Google-managed project, not directly in yours. That’s why you don’t see it listed in your Spanner console.
  • Even though it’s “hidden” from your view, the costs for running that Spanner instance (compute, storage, etc.) are passed through to your billing account.
  • The default “Basic” tier for RagManagedDb provisions a small Spanner instance (100 processing units), which would result in daily charges.