Select your cookie preferences

We use essential cookies and similar tools that are necessary to provide our site and services. We use performance cookies to collect anonymous statistics, so we can understand how customers use our site and make improvements. Essential cookies cannot be deactivated, but you can choose “Customize” or “Decline” to decline performance cookies.

If you agree, AWS and approved third parties will also use cookies to provide useful site features, remember your preferences, and display relevant content, including relevant advertising. To accept or decline all non-essential cookies, choose “Accept” or “Decline.” To make more detailed choices, choose “Customize.”

Identify when your Lightsail instance bursts

Focus mode
Identify when your Lightsail instance bursts - Amazon Lightsail

On the CPU utilization metric graph for your instances, you will see a sustainable zone, and a burstable zone. In the following CPU utilization metric graph example, the performance baseline is 10% because the instance uses the Linux or Unix-based $7 USD/month instance plan.

Sustainable and burstable zones on the CPU utilization graph

Your Lightsail instance can operate in the sustainable zone indefinitely with no impact to the operation of your system. Your instance may begin operating in the burstable zone when under heavy load, such as when compiling code, installing new software, running a batch job, or serving peak load requests. While operating in the burstable zone, your instance is consuming a higher amount of CPU cycles. Therefore, it can only operate in this zone for a limited period of time.

The period of time your instance can operate in the burstable zone is dependent on how far into the burstable zone it is. An instance operating in the lower end of the burstable zone can burst for a longer period of time than an instance operating in the higher end of the burstable zone. However, an instance that is anywhere in the burstable zone for a sustained period of time will eventually use up all the CPU capacity until it operates in the sustainable zone again. Therefore, it is important to also monitor the remaining CPU burst capacity, which is described in the following section of this guide.

PrivacySite termsCookie preferences
© 2025, Amazon Web Services, Inc. or its affiliates. All rights reserved.