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diff --git a/health/guides/cgroups/k8s_cgroup_ram_in_use.md b/health/guides/cgroups/k8s_cgroup_ram_in_use.md deleted file mode 100644 index aec443b78..000000000 --- a/health/guides/cgroups/k8s_cgroup_ram_in_use.md +++ /dev/null @@ -1,42 +0,0 @@ -### Understand the alert - -This alert monitors the `RAM usage` in a Kubernetes cluster by calculating the ratio of the memory used by a cgroup to its memory limit. If the memory usage exceeds certain thresholds, the alert triggers and indicates that the system's memory resources are under pressure. - -### Troubleshoot the alert - -1. Check overall RAM usage in the cluster - - Use the `kubectl top nodes` command to check the overall memory usage on the cluster nodes: - ``` - kubectl top nodes - ``` - -2. Identify Pods with high memory usage - - Use the `kubectl top pods --all-namespaces` command to identify Pods consuming a high amount of memory: - ``` - kubectl top pods --all-namespaces - ``` - -3. Inspect logs for errors or misconfigurations - - Check the logs of Pods consuming high memory for any issues or misconfigurations: - ``` - kubectl logs -n <namespace> <pod_name> - ``` - -4. Inspect container resource limits - - Review the resource limits defined in the Pod's yaml file, particularly the `limits` and `requests` sections. If you're not setting limits on Pods, then consider setting appropriate limits to prevent running out of resources. - -5. Scale or optimize applications - - If high memory usage is expected and justified, consider scaling the application by adding replicas or increasing the allocated resources. - - If the memory usage is not justified, optimizing the application code or configurations may help reduce memory usage. - -### Useful resources - -1. [Kubernetes best practices: Organizing with Namespaces](https://kubernetes.io/docs/concepts/overview/working-with-objects/namespaces/) -2. [Managing Resources for Containers](https://kubernetes.io/docs/concepts/configuration/manage-resources-containers/) -3. [Configure Default Memory Requests and Limits](https://kubernetes.io/docs/tasks/administer-cluster/memory-default-namespace/)
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