|Monitoring for Amazon EBS Volumes||You can now get Amazon CloudWatch monitoring data for your Amazon Elastic Block Store volumes. Monitoring is enabled automatically for all your volumes at no additional charge.
You can get a series of metrics for your volumes from either the Amazon CloudWatch API or the AWS Management Console. The data is available for each volume at a period of 5 minutes (i.e., one datapoint per metric per volume every 5 minutes). The console displays a series of graphs based on the raw metrics from the Amazon CloudWatch API. The graphs for a volume are on the Monitoring tab that is displayed when you select the volume in the console.
For information about the metrics available through the API and the graphs available in the console, go to Monitoring Your Instances and Volumes in the Amazon Elastic Compute Cloud User Guide.
|Query Version of ModifyInstanceAttribute||The Query API ModifyInstanceAttribute request does not allow the block-device-mappings to be modified and the user-data attribute cannot be modified if it already contains data.|
|Paid AMIs Backed by Amazon EBS||Amazon DevPay does not support Amazon EBS-backed AMIs.|
|Windows AMI launch times||Windows AMIs take longer to launch than Linux/UNIX AMIs due to larger AMI sizes and multiple reboots.|
|Windows AMI sizes||Installing software on Amazon S3-backed Window AMIs can cause the AMI to become oversized and reach the 10 GiB limit quickly. Before bundling, check the size of the C:\ volume.|
|Limitation on drive mapping||There are limitations on devices available for storage attachment. For more information, go to How to Attach the Volume to an Instance in the Amazon Elastic Compute Cloud User Guide.|
|Instance limit||New users are limited to a maximum of 20 concurrent instances, but many of our customers use hundreds or thousands of instances. If you need a higher limit, go to the Request to Increase Amazon EC2 Instance Limit page.|