[Question]: Information request for resource utilization warnings feature re-enablement

[kemats]

Describe your question

The resource utilization warnings feature is currently disabled by removing $(AZP_ENABLE_RESOURCE_UTILIZATION_WARNINGS) agent knob as temporary workaround for performance degradation issue #4781.
Please update here for users' awareness once the issue is fixed and the feature is re-enabled.

Versions

Agent version '3.239.1'

Environment type (Please select at least one enviroment where you face this issue)

• Self-Hosted
• Microsoft Hosted
• VMSS Pool
• Container

Azure DevOps Server type

dev.azure.com (formerly visualstudio.com)

Operation system

No response

Version controll system

No response

Azure DevOps Server Version (if applicable)

No response

[vmapetr]

Hi @kemats,
We completed and merged the PR with the fixes for the resource utilization monitor - #4803.

In scope of this PR we:

• Fixed the issue with the incorrect CPU metrics for Linux/Windows/MacOS
• Added metrics catching between debug and warning monitors, which decrease the amount of metric requests and improve performance
• Switched the Windows metrics methods to use .Net ManagementObjectSearcher queries instead of direct calls of the deprecated WMIC.exe which will resolve the issue with thread pool exhaustion.
• Replaced synchronous metric methods with asynchronous requests that support cancellation to avoid the issue with the blocking requests
• And other minor improvements that will improve overall performance and will provide more accurate resource usage data

The changes will be available on the next agent rollout. We'll inform you after deployment will be completed.

[vmapetr]

Hi @kemats!
We deployed the new agent version with implemented fixes, and started rollout for the FF which enables the resource monitor warnings.

[jappenzesr]

Hi, resource utilization warnings have disappeared since agent version 3.243.1. They worked fine in 3.242.1. Is this somehow related, and how can we bring them back?

[jappenzesr]

Hi - do you have an update here?

[vmapetr]

Hi @jappenzesr, the resource utilization monitor and related features including warnings were reworked and it is available for the agent versions start from https://github.com/microsoft/azure-pipelines-agent/releases/tag/v3.243.1.