r8g.medium as an EKS node
1 vCPU8 GiBarm64AWS Graviton4 ProcessorAWS us-east-1R8G Medium
Where the r8g.medium goes
Default EKS setup: EKS, VPC CNI default (ENI limit).
CPU0.74 of 1 vCPU left for your pods
Memory7.27 GiB of 8 GiB left for your pods
your podsDaemonSets (200m, 300 MiB assumed)kubelet reservedeviction
8max pods per node
$43.00on demand / month · $0.0589/h
$15.64spot / month (varies)
r8g.medium EKS max pods and allocatable memory — quick answers
- How many pods can a r8g.medium run as a node with EKS, VPC CNI default (ENI limit)? Up to 8; kubelet keeps 443 MiB of memory and 60m CPU, leaving 7.57 GiB and 0.94 vCPU for pods.
- How many pods can a r8g.medium run as a node with EKS, prefix delegation? Up to 110; kubelet keeps 1565 MiB of memory and 60m CPU, leaving 6.47 GiB and 0.94 vCPU for pods.
- How many 500m / 1 GiB pods fit? 1 per node after DaemonSets; 10 nodes for 10 replicas, about $430.04/month on demand.
What kubelet reserves on r8g.medium
| 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 | 8 | 60m | 343 Mi + 100 Mi | 0.94 | 7.57 GiB | 94.6% |
| EKS, prefix delegation ENABLE_PREFIX_DELEGATION=true | 110 | 60m | 1465 Mi + 100 Mi | 0.94 | 6.47 GiB | 80.9% |
How these numbers are computed: reservation formulas. How many subnet IPs a r8g.medium 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 r8g.medium
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 | 5 | 7 | $8.60 |
| 250m / 256 Mi | 2 | 2 | $21.50 |
| 250m / 512 Mi | 2 | 2 | $21.50 |
| 500m / 512 Mi | 1 | 1 | $43.00 |
| 500m / 1024 Mi | 1 | 1 | $43.00 |
| 1000m / 1024 Mi | 0 | 0 | — |
| 1000m / 2048 Mi | 0 | 0 | — |
| 2000m / 4096 Mi | 0 | 0 | — |
| 4000m / 8192 Mi | 0 | 0 | — |
Similar EKS node types
| Type | vCPU | GiB | Alloc CPU | Alloc memory | Max pods | $/month | $ per alloc GiB |
|---|---|---|---|---|---|---|---|
| r6g.medium | 1 | 8 | 0.94 | 7.57 GiB | 8 | $36.79 | $4.86 |
| r7g.medium | 1 | 8 | 0.94 | 7.57 GiB | 8 | $39.13 | $5.17 |
| r6gd.medium | 1 | 8 | 0.94 | 7.57 GiB | 8 | $42.05 | $5.56 |
| r9g.medium | 1 | 8 | 0.94 | 6.47 GiB | 110 | $46.87 | $7.24 |
| r7gd.medium | 1 | 8 | 0.94 | 7.57 GiB | 8 | $49.64 | $6.56 |
| r8gd.medium | 1 | 8 | 0.94 | 7.57 GiB | 8 | $53.64 | $7.09 |
| r7a.medium | 1 | 8 | 0.94 | 7.57 GiB | 8 | $55.54 | $7.34 |
| r8a.medium | 1 | 8 | 0.94 | 7.57 GiB | 8 | $58.31 | $7.71 |
Closest match on other clouds
| Type | vCPU | GiB | Alloc CPU | Alloc memory | Max pods | $/month | $ per alloc GiB |
|---|---|---|---|---|---|---|---|
| n4a-highmem-1 | 1 | 8 | 0.94 | 6.10 GiB | 110 | $36.89 | $6.05 |
| c4a-highmem-1 | 1 | 8 | 0.94 | 6.10 GiB | 110 | $43.03 | $7.05 |
| f1amsv7 | 1 | 8 | 0.94 | 5.90 GiB | 250 | $65.33 | $11.07 |
| dc1sv3 | 1 | 8 | 0.94 | 5.90 GiB | 250 | $70.08 | $11.87 |
| f1amdsv7 | 1 | 8 | 0.94 | 5.90 GiB | 250 | $79.57 | $13.48 |
| dc1dsv3 | 1 | 8 | 0.94 | 5.90 GiB | 250 | $82.49 | $13.98 |