bottlerocket-os / bottlerocket-os/bottlerocket

Memory utilization is higher in some EKS workloads

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#3,575 10 comments 2 reactions 0 assignees View on GitHub
area/core type/bug
Dominant language
Rust
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Description

**Image I'm using:**

AMI ID: ami-0f3b9574af04c5bf4
BottleRocket Release: bottlerocket-aws-k8s-1.28-x86_64-v1.16.0-d2d9cf87

**What I expected to happen:**

After switching from the standard Amazon Linux 2 AMI for EKS, we rolled out the nodes with BottleRocket. The workloads should have stayed with the same performance benchmark.

**What actually happened:**

We noticed some of the same workloads which we had before utilize much more memory than before and reach OOM. After making the memory limit larger, it set on a certain number, which was higher by about 1-1.5 GiB than the memory usage before.

**How to reproduce the problem:**

Deploy various kind of workloads firstly on any standard Amazon Linux 2 AMI on EKS, and then update the nodes to be Bottlerocket using a rolling update. Measure the workloads' memory utilization.

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