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Azure App Service Load Balancing "SiteLoadBalancing.LeastRequests" is "Least Active Requests"?

The Azure App Service load balancing setting "SiteLoadBalancing.LeastRequests" is the "Least Active Requests" algorithm, right?
https://learn.microsoft.com/en-us/dotnet/api/microsoft.azure.powershell.cmdlets.websites.support.siteloadbalancing.leastrequests?view=az-ps-latest

SiteLoadBalancing.LeastRequests

Am I understanding that correctly?

https://learn.microsoft.com/en-us/answers/questions/2121068/azure-app-service-load-balancing-siteloadbalancing
https://learn.microsoft.com/en-us/answers/questions/2121068/azure-app-service-load-balancing-siteloadbalancing

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Answers


  1. 0

    Yes, you are correct. The Azure App Service load balancing setting SiteLoadBalancing.LeastRequests uses the "Least Active Requests" algorithm. This means that incoming requests are directed to the instance with the least number of active requests at that moment.

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  2. 0

    The Azure App Service load balancing setting "SiteLoadBalancing.LeastRequests" is the "Least Active Requests" algorithm, right?

    Yes, you are correct. The Azure App Service load balancing setting SiteLoadBalancing.LeastRequests corresponds to the "Least Active Requests" algorithm.

    • It sends traffic to the server with the least number of active requests, helping to balance the load evenly across servers.
    • Please refer this doc for better understanding about load balancing.

    To set the load balancing to SiteLoadBalancing.LeastRequests

    Go to your Azure App Service – >Environment variables – > add below environment variable.

    enter image description here

    To test the load balancing behavior

    Go to your azure app service – > click on scale out (app service plan) -> Increase the instance count to more than one

    • Use Application Insights to observe the load distribution across your instances.
    • You can also view metrics in your App Service, as following

    enter image description here

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