EBS - Known Issue - Optimizing EBS volume performance


Make sure your Amazon EC2 instance is a type that can be optimized for use with Amazon EBS. An EBS-optimized EC2 instance provides dedicated network throughput for volumes. EBS-optimized instances are required for use with Provisioned IOPS (SSD) volumes, but the performance of other EBS volume types is also improved with EBS-optimized instances. For a description of the instance types, see Amazon EC2 Instance Configuration.

For optimal EBS performance, you must pre-warm the volume. For detailed steps, see Pre-Warming Amazon EBS Volumes.

For details on this and other performance tips, see Amazon EBS Volume Performance in the Amazon EC2 User Guide.

These blog postings have useful information about tools for gathering volume performance data:


AWS Trusted Advisor provides checks that can help you improve the performance of your Amazon EBS volumes.


If you continue to experience difficulties, please open a case with the DLT Opscenter using the following contact information:



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