RDS Instance class modification error
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Cannot modify the instance class because there are not enough availability zones that have the requested instance class. Please try your request again at a later time.
Getting this error while trying to modify the RDS SQL Server instance t3.xlarge in us-east-1 region.. Could someone help what the issue is and how to solve it
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asked 10 months ago435 views
2 Answers
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Hi,
Please, have a look at https://repost.aws/knowledge-center/aurora-mysql-instance-class-error
1st part of section "Resolution" clearly explains the cause of your issue and how to remediate it.
Best,
Didier
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I have had the same error before and even raised a support ticket with AWS and they came back with the same answer as Didier.
I had to work around this issue and AWS never fixed it.
- Create snapshot of existing RDS instance.
- delete existing instance.
- restore snapshot with the size you need
2nd option.
- Create snapshot of RDS instance.
- delete existing snapshot.
- restore snapshot in different AZ and the problem never happens again.
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Hi, thanks for the answer. 'm able to see my RDS AZ in the command output of the resolution.
aws rds describe-orderable-db-instance-options --engine aurora --engine-version 5.6.10a --db-instance-class db.t3.medium --query 'OrderableDBInstanceOptions[].AvailabilityZones'still i'm able to see the same error.Ok, in how many AZs do you deploy the RDS instance? Just one or more ?
it's a multi-az instance for which subnet groups are spawned in two AZs
Hi, so do you see the 2 AZ replicas for your RDS instance ?
hey sorry, i didn't get the 2 AZ replicas thing. sorry. But my RDS is running on 2 AZs which means multi-AZ is turned on.