RDS high IOPS effects


What will happen to an RDS instance that is high on IOPS for a long time ?
In EC2s when this happens we are locked out of the ec2 and cannot connect to it (ever !)

The RDS is Multi-AZ.

asked 8 months ago123 views
1 Answer


When you reach Maximum IOPS, provisioning less than 100 GiB of General Purpose SSD storage might result in higher latencies if you exhaust your I/O credit balance.

So How to Improve the IOPS: You find the link below there you can see a table of Provisioned IOPS and storage size range for each database engine, So if you increase size of the disk then you will get more IOPS it helps your application performance IOPS


RDS Multi AZ:

In an Amazon RDS Multi-AZ deployment, Amazon RDS automatically creates a primary database (DB) instance and synchronously replicates the data to an instance in a different AZ. When it detects a failure, Amazon RDS automatically fails over to a standby instance without manual intervention.

So you will get failover but not IOPS by using this solution i think



If you are using burstable instances it have baseline performance so it is recommended not use t type instance if you are using and remember that Ec2 instances also have the IOPS based on the storage if you will incrase the storage you will get more performance, You find information here https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-volume-types.html

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Thank You GK

answered 8 months ago
  • Hi @GK.

    We are using multi-az. Will having high IOPS result in one of the instances failing and trigger failover ? Or will it just stay overloaded ?

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