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I cannot stress enough how important it is to exclude autoscaler resource updates in ArgoCD.

After the GKE 1.25 upgrade, the application controller CPU usage went through the roof. Gettting ArgoCD upgraded to get the ignoreResourceUpdates feature and excluding autoscaler resource updates got the CPU usage to drop below even pre-upgrade usage.

Graph showing the argocd-application-controller's medium CPU usage prior to a Kubernetes upgrade which sent the CPU usage through the roof constantly until argocd was configured to exclude autoscaler resource updates after which the CPU usage settled at about 1/6th of the max. Graph showing the argocd-application-controller's medium CPU usage prior to a Kubernetes upgrade which sent the CPU usage through the roof constantly until argocd was configured to exclude autoscaler resource updates after which the CPU usage settled at about 1/6th of the max.
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