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How is RDS for SQL Server Express charged?

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I have configured RDS for SQL Server Express (which I hopefully will not be charged). I understand that for free tier, I have 750 hours per month. How is 750 hours per month counted? If I have RDS available for 24 hours, will that be counted as 24 hours usage? Or I have to login to my EC2 server and run an application which connect to RDS database. If my application was connected for 2 hours and that will be counted as 2 hours out of 750 hours. Is this the right way to count the RDS hours?

1 Answers
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Accepted Answer

From the docs

AWS Free Tier with Amazon RDS

  • 750 hours of Amazon RDS Single-AZ db.t2.micro Instance usage running MySQL, MariaDB, PostgreSQL, Oracle BYOL or SQL Server (running SQL Server Express Edition) – enough hours to run a DB Instance continuously each month
  • 20 GB of General Purpose (SSD) DB Storage**
  • 20 GB of backup storage for your automated database backups and any user-initiated DB Snapshots**

** Backup storage is free up to 20 GB or the size of your DB storage, whichever is less, and requires you to have at least one DB instance running in your account. If you exceed these limits, or if you terminate all DB instances in your account, backup storage will be charged at standard RDS rates.

For your case ensure you are running a single-az db.t2.micro with no more than 20GB of DB storage. To verify if you are falling within the free offering refer to the billing console and look at your bill. From here you will be able to see if you are being charged and if you are you can determine what you have launched outside the scope of the free offering.

answered 7 months ago

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