r8a.2xlarge as an EKS node
8 vCPU64 GiBx86_64AMD EPYC 9R45 ProcessorAWS us-east-1R8A Double Extra Large
Where the r8a.2xlarge goes
Default EKS setup: EKS, VPC CNI default (ENI limit).
CPU7.71 of 8 vCPU left for your pods
Memory61.66 GiB of 64 GiB left for your pods
your podsDaemonSets (200m, 300 MiB assumed)kubelet reservedeviction
158max pods per node
$466.50on demand / month · $0.6390/h
$200.33spot / month (varies)
r8a.2xlarge EKS max pods and allocatable memory — quick answers
- How many pods can a r8a.2xlarge run as a node with EKS, VPC CNI default (ENI limit)? Up to 158; kubelet keeps 2093 MiB of memory and 90m CPU, leaving 61.96 GiB and 7.91 vCPU for pods.
- How many pods can a r8a.2xlarge run as a node with EKS, prefix delegation? Up to 110; kubelet keeps 1565 MiB of memory and 90m CPU, leaving 62.47 GiB and 7.91 vCPU for pods.
- How many 500m / 1 GiB pods fit? 15 per node after DaemonSets; 1 nodes for 10 replicas, about $466.50/month on demand.
What kubelet reserves on r8a.2xlarge
| Setup | Max pods | kube-reserved CPU | Memory reserved + eviction | Allocatable CPU | Allocatable memory | Memory usable |
|---|---|---|---|---|---|---|
| EKS, VPC CNI default (ENI limit) secondary IPs per ENI | 158 | 90m | 1993 Mi + 100 Mi | 7.91 | 61.96 GiB | 96.8% |
| EKS, prefix delegation ENABLE_PREFIX_DELEGATION=true | 110 | 90m | 1465 Mi + 100 Mi | 7.91 | 62.47 GiB | 97.6% |
How these numbers are computed: reservation formulas. How many subnet IPs a r8a.2xlarge takes with the VPC CNI: EKS max pods and IP calculator. Check a live node with kubectl describe node → Allocatable.
How many pods fit on one r8a.2xlarge
Assumes DaemonSets (CNI, kube-proxy, log and metrics agents) request 200m CPU, 300 Mi and 3 pods per node. Try your own numbers in the node calculator.
| Pod requests (CPU / memory) | EKS, VPC CNI default (ENI limit) | EKS, prefix delegation | $ per pod / month |
|---|---|---|---|
| 100m / 128 Mi | 77 | 77 | $6.06 |
| 250m / 256 Mi | 30 | 30 | $15.55 |
| 250m / 512 Mi | 30 | 30 | $15.55 |
| 500m / 512 Mi | 15 | 15 | $31.10 |
| 500m / 1024 Mi | 15 | 15 | $31.10 |
| 1000m / 1024 Mi | 7 | 7 | $66.64 |
| 1000m / 2048 Mi | 7 | 7 | $66.64 |
| 2000m / 4096 Mi | 3 | 3 | $155.50 |
| 4000m / 8192 Mi | 1 | 1 | $466.50 |
Similar EKS node types
| Type | vCPU | GiB | Alloc CPU | Alloc memory | Max pods | $/month | $ per alloc GiB |
|---|---|---|---|---|---|---|---|
| r6g.2xlarge | 8 | 64 | 7.91 | 63.03 GiB | 58 | $294.34 | $4.67 |
| r7g.2xlarge | 8 | 64 | 7.91 | 63.03 GiB | 58 | $312.73 | $4.96 |
| r5a.2xlarge | 8 | 64 | 7.91 | 63.03 GiB | 58 | $329.96 | $5.23 |
| r6a.2xlarge | 8 | 64 | 7.91 | 63.03 GiB | 58 | $331.13 | $5.25 |
| r6gd.2xlarge | 8 | 64 | 7.91 | 63.03 GiB | 58 | $336.38 | $5.34 |
| r8g.2xlarge | 8 | 64 | 7.91 | 63.03 GiB | 58 | $344.03 | $5.46 |
| r5.2xlarge | 8 | 64 | 7.91 | 63.03 GiB | 58 | $367.92 | $5.84 |
| r6i.2xlarge | 8 | 64 | 7.91 | 63.03 GiB | 58 | $367.92 | $5.84 |
Closest match on other clouds
| Type | vCPU | GiB | Alloc CPU | Alloc memory | Max pods | $/month | $ per alloc GiB |
|---|---|---|---|---|---|---|---|
| e2-highmem-8 | 8 | 64 | 7.91 | 58.42 GiB | 110 | $263.97 | $4.52 |
| e8psv6 | 8 | 64 | 7.82 | 58.97 GiB | 250 | $269.37 | $4.57 |
| e8psv5 | 8 | 64 | 7.82 | 58.97 GiB | 250 | $294.19 | $4.99 |
| n4a-highmem-8 | 8 | 64 | 7.91 | 58.42 GiB | 110 | $295.15 | $5.05 |
| n4d-highmem-8 | 8 | 64 | 7.91 | 58.42 GiB | 110 | $324.65 | $5.56 |
| e8asv5 | 8 | 64 | 7.82 | 58.97 GiB | 250 | $329.96 | $5.60 |