Create NodeMemoryMajorPagesFaults.md

content/runbooks/node/NodeMemoryMajorPagesFaults.md

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+---
+title: NodeMemoryMajorPagesFaults
+weight: 20
+---
+
+# NodeMemoryMajorPagesFaults
+
+## Meaning
+
+The `NodeMemoryMajorPagesFaults` alert is triggered when a Kubernetes node experiences a significant number of major page faults, indicating issues with memory access. This could be due to excessive swapping of memory pages to the swap area or general memory problems.
+
+As shown here: 
+[Kubernetes-Mixin](https://monitoring.mixins.dev/node-exporter/)
+> Memory major pages are occurring at very high rate at {{ $labels.instance }}, 500 major page faults per second for the last 15 minutes, is currently at {{ printf "%.2f" $value }}. 
+>
+> Please check that there is enough memory available at this instance. 
+
+## Impact
+
+- Possible performance degradation for applications running on the affected Kubernetes node.
+- Increased latency for memory accesses.
+- Risk of application crashes or errors due to memory overload.
+
+## Diagnosis
+
+1. Check the utilization of physical memory (RAM) and swap space on the affected Kubernetes node.
+2. Examine the memory profiles of running applications to determine which processes are consuming memory.
+3. Monitor memory usage over time to identify trends and peak loads.
+
+
+## Mitigation
+
+1. Optimize the resource utilization of running applications by stopping unnecessary processes or adjusting their resource requirements.
+2. Review Kubernetes resource requests and limits configuration to ensure they match the actual requirements of the applications.
+3. Scale the resources of the Kubernetes node as needed by adding additional memory or increasing node capacity.
+4. Optimize swap configuration to ensure efficient utilization while minimizing the impact of swapping on performance.