Inactive AppStream Image Builder or App Block Builder Instances

Jason DiDomenico

Service Category

Compute

Cloud Provider

AWS

Service Name

AWS AppStream 2.0

Inefficiency Type

Unused Resource

Explanation

When AppStream builder instances are left running but unused, they continue to generate compute charges without delivering any value. These instances are commonly left active after configuration or image creation is completed but can be safely stopped or terminated when not in use. Identifying and decommissioning inactive builders helps reduce unnecessary compute costs.

Relevant Billing Model

AppStream 2.0 Image Builder and App Block Builder instances are billed per hour while running, regardless of whether they are actively in use. Charges accrue continuously while the instance is in the running state, even if no users are connected or no configuration is taking place.

Detection

Identify AppStream Image Builder or App Block Builder instances that have remained in a running state without recent user connections or image-related activity
Review historical usage patterns to determine if the instance was left on after setup or testing
Check for absence of scheduled image builds, configuration updates, or automation tied to the builder
Validate with application administrators whether the builder instance is still needed

Remediation

Stop or decommission builder instances that are no longer required.
Implement an automated workflow—such as a scheduled Lambda function—that stops builder instances after a defined period of inactivity.
Establish operational guidelines to ensure builder instances are shut down after image creation or testing tasks are completed.

Relevant Documentation

AppStream 2.0 Image Builder Overview

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