Performance - Amazon Web Services Support
Services or capabilities described in Amazon Web Services documentation might vary by Region. To see the differences applicable to the China Regions, see Getting Started with Amazon Web Services in China.

Performance

Improve the performance of your service by checking your service quotas (formerly referred to as limits), so that you can take advantage of provisioned throughput, monitor for overutilized instances, and detect any unused resources.

You can use the following checks for the performance category.

Amazon EBS Provisioned IOPS (SSD) Volume Attachment Configuration

Description

Checks for Provisioned IOPS (SSD) volumes that are attached to an Amazon EBS optimizable Amazon Elastic Compute Cloud (Amazon EC2) instance that is not EBS-optimized.

Provisioned IOPS (SSD) volumes in the Amazon Elastic Block Store (Amazon EBS) are designed to deliver the expected performance only when they are attached to an EBS-optimized instance.

Check ID

PPkZrjsH2q

Alert Criteria

Yellow: An Amazon EC2 instance that can be EBS-optimized has an attached Provisioned IOPS (SSD) volume but the instance is not EBS-optimized.

Recommended Action

Create a new instance that is EBS-optimized, detach the volume, and reattach the volume to your new instance. For more information, see Amazon EBS-Optimized Instances and Attaching an Amazon EBS Volume to an Instance.

Additional Resources
Report columns
  • Status

  • Region/AZ

  • Volume ID

  • Volume Name

  • Volume Attachment

  • Instance ID

  • Instance Type

  • EBS Optimized

High Utilization Amazon EC2 Instances

Description

Checks the Amazon Elastic Compute Cloud (Amazon EC2) instances that were running at any time during the last 14 days. An alert is sent if daily CPU utilization was greater than 90% on four or more days.

Consistent high utilization can indicate optimized, steady performance. However, it can also indicate that an application does not have enough resources. To get daily CPU utilization data, download the report for this check.

Check ID

ZRxQlPsb6c

Alert Criteria

Yellow: An instance had more than 90% daily average CPU utilization on at least 4 of the previous 14 days.

Recommended Action

Consider adding more instances. For information about scaling the number of instances based on demand, see What is Auto Scaling?

Additional Resources
Report columns
  • Region/AZ

  • Instance ID

  • Instance Type

  • Instance Name

  • 14-Day Average CPU Utilization

  • Number of Days over 90% CPU Utilization

Large Number of EC2 Security Group Rules Applied to an Instance

Description

Checks for Amazon Elastic Compute Cloud (Amazon EC2) instances that have a large number of security group rules. Performance can be degraded if an instance has a large number of rules.

Check ID

j3DFqYTe29

Alert Criteria
  • Yellow: An Amazon EC2-VPC instance has more than 50 security group rules.

  • Yellow: An Amazon EC2-Classic instance has more than 100 security group rules.

Recommended Action

Reduce the number of rules associated with an instance by deleting unnecessary or overlapping rules. For more information, see Deleting Rules from a Security Group.

Additional Resources

Amazon EC2 Security Groups

Report columns
  • Region

  • Instance ID

  • Instance Name

  • VPC ID

  • Total Inbound Rules

  • Total Outbound Rules

Large Number of Rules in an EC2 Security Group

Description

Checks each Amazon Elastic Compute Cloud (Amazon EC2) security group for an excessive number of rules.

If a security group has a large number of rules, performance can be degraded.

Check ID

tfg86AVHAZ

Alert Criteria
  • Yellow: An Amazon EC2-VPC security group has more than 50 rules.

  • Yellow: An Amazon EC2-Classic security group has more than 100 rules.

Recommended Action

Reduce the number of rules in a security group by deleting unnecessary or overlapping rules. For more information, see Deleting Rules from a Security Group.

Additional Resources

Amazon EC2 Security Groups

Report columns
  • Region

  • Security Group Name

  • Group ID

  • Description

  • Instance Count

  • VPC ID

  • Total Inbound Rules

  • Total Outbound Rules

Overutilized Amazon EBS Magnetic Volumes

Description

Checks for Amazon Elastic Block Store (Amazon EBS) magnetic volumes that are potentially overutilized and might benefit from a more efficient configuration.

A magnetic volume is designed for applications with moderate or bursty input/output (I/O) requirements, and the IOPS rate is not guaranteed. It delivers approximately 100 IOPS on average, with a best-effort ability to burst to hundreds of IOPS. For consistently higher IOPS, you can use a Provisioned IOPS (SSD) volume. For bursty IOPS, you can use a General Purpose (SSD) volume. For more information, see Amazon EBS Volume Types.

For a list of instance types that support EBS-optimized behavior, see Amazon EBS-Optimized Instances.

To get daily utilization metrics, download the report for this check. The detailed report shows a column for each of the last 14 days. If there is no active EBS volume, the cell is empty. If there is insufficient data to make a reliable measurement, the cell contains N/A. If there is sufficient data, the cell contains the daily median and the percentage of the variance in relation to the median (for example, 256 / 20%).

Check ID

k3J2hns32g

Alert Criteria

Yellow: An Amazon EBS Magnetic volume is attached to an instance that can be EBS-optimized or is part of a cluster compute network with a daily median of more than 95 IOPS, and varies by less than 10% of the median value for at least 7 of the past 14 days.

Recommended Action

For consistently higher IOPS, you can use a Provisioned IOPS (SSD) volume. For bursty IOPS, you can use a General Purpose (SSD) volume. For more information, see Amazon EBS Volume Types.

Additional Resources

Amazon Elastic Block Store (Amazon EBS)

Report columns
  • Status

  • Region

  • Volume ID

  • Volume Name

  • Number of Days Over

  • Max Daily Median

Note

If you opted in your account for Amazon Compute Optimizer, we recommend that you use the Amazon EBS under-provisioned volumes check instead. For more information, see Opt in Amazon Compute Optimizer for Trusted Advisor checks.