Application and service node pool memory utilization is more than 100% which is causing issue and slowness

Question

Application and service node pool memory utilization is more than 100% which is causing issue and slowness

Rajnish Sharma 1

Apr 14, 2025, 7:39 AM

Production server node pool and system pool show MAX memory more than 100% which causing website slowness and down sometime immediate help neeeded

Dharani Reguri 345 Reputation points Microsoft External Staff

Apr 14, 2025, 11:30 AM
Hi Rajnish Sharma,

I understood that your website is experiencing slowness due to high memory consumption. With the help of node saturation metrics, we can identify the nodes that have memory saturation. you can also connect to your AKS cluster and run kubectl top nodes, which will show you the CPU and memory usage on the nodes.

Here are the best practices to mitigate memory saturation.

By scaling the cluster, it stops any single pod or node from getting overloaded with too much data, which helps prevent memory issues.

Kubernetes provides options to specify the minimum memory size (request) and the maximum memory size (limit) for a container. By configuring limits on pods, you can avoid memory pressure on the node.

When you are adding new node, you can use node selectors and affinity or anti-affinity tags, which can isolate the workload to specific nodes. By using anti-affinity tags, you can prevent other workloads from scheduling pods on these nodes. This reduces the memory saturation problem.

You can also choose higher RAM VMs to mitigate the memory saturation issues.

Please refer to the documents below:

https://techcommunity.microsoft.com/blog/appsonazureblog/announcing-new-features-for-enhanced-cluster-troubleshooting/3966586

memory saturation aks

Please let me know if you have any further queries. If the information is helpful, please "Upvote it."

Thank you.
Dharani Reguri 345 Reputation points Microsoft External Staff

Apr 15, 2025, 11:15 AM

Hi Rajnish Sharma,

Just checking in to see if you have got a chance to see my response to your question in resolving the issue.

If it was helpful, please click "Upvote" on this post to let us know.

Thank You.

1 answer

Your answer

Dharani Reguri 345 Reputation points Microsoft External Staff

Apr 14, 2025, 11:30 AM

Hi Rajnish Sharma,

I understood that your website is experiencing slowness due to high memory consumption. With the help of node saturation metrics, we can identify the nodes that have memory saturation. you can also connect to your AKS cluster and run kubectl top nodes, which will show you the CPU and memory usage on the nodes.

Here are the best practices to mitigate memory saturation.

By scaling the cluster, it stops any single pod or node from getting overloaded with too much data, which helps prevent memory issues.

Kubernetes provides options to specify the minimum memory size (request) and the maximum memory size (limit) for a container. By configuring limits on pods, you can avoid memory pressure on the node.

When you are adding new node, you can use node selectors and affinity or anti-affinity tags, which can isolate the workload to specific nodes. By using anti-affinity tags, you can prevent other workloads from scheduling pods on these nodes. This reduces the memory saturation problem.

You can also choose higher RAM VMs to mitigate the memory saturation issues.

Please refer to the documents below:

https://techcommunity.microsoft.com/blog/appsonazureblog/announcing-new-features-for-enhanced-cluster-troubleshooting/3966586

memory saturation aks

Please let me know if you have any further queries. If the information is helpful, please "Upvote it."

Thank you.
Dharani Reguri 345 Reputation points Microsoft External Staff

Apr 15, 2025, 11:15 AM

Hi Rajnish Sharma,

Just checking in to see if you have got a chance to see my response to your question in resolving the issue.

If it was helpful, please click "Upvote" on this post to let us know.

Thank You.

Answer 1

LISBOA-4826 240

Apr 15, 2025, 9:03 PM

Hi Rajnish Sharma •

Welcome to the Microsoft Q&A Platform! Thank you for asking your question here.

Regarding your question, please check the link below. The AKS pods has to be configured to have limits, and so on.

https://learn.microsoft.com/en-us/troubleshoot/azure/azure-kubernetes/availability-performance/identify-memory-saturation-aks?tabs=browser#step-2-review-best-practices-to-avoid-memory-saturation

Let me know if you need more details.

att,

Lisboa

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Application and service node pool memory utilization is more than 100% which is causing issue and slowness

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