# How can you improve Argo CD performance when managing a very large number of applications or clusters?

Argo CD, Hard (Expert), Performance & Scaling. https://k8wiz.com/uquiz/how-can-you-improve-argo-cd-performance-when-managing-a-very-large-number-of-applications-or-clusters

- A. Increase the polling frequency to every 1 second
- B. Shard applications across multiple controllers (use ARGOCD_CONTROLLER_REPLICAS)
- C. Disable health checks
- D. Use a single Argo CD instance only

**Answer:** Shard applications across multiple controllers (use ARGOCD_CONTROLLER_REPLICAS)

**Explanation:** For large deployments, you can shard apps/clusters by running multiple app-controller instances and setting the ARGOCD_CONTROLLER_REPLICAS environment variable.