r5dn.large

Analysis

The r5dn.large is a memory optimized instance in the r5dn series with 2 vCPUs and 16 GiB of memory on Intel Xeon Platinum 8259 (Cascade Lake) (up to 3.1 GHz), which makes it memory-heavy at 8 GiB of memory per vCPU.

Within the same generation and size, the r5a.large on AMD EPYC 7571 costs $0.1130/hour, 32% less ($39.42 a month). The other variants are the r5.large at $0.1260, the r5ad.large at $0.1310 and the r5d.large at $0.1440.

Running it in N. Virginia instead of Sydney saves $27.01 a month per instance: $0.1670/hour against $0.2040/hour, a 22% spread. It is not offered in Canada Central, São Paulo, London and Mumbai, so plan around that if you need a presence there.

On demand it costs $0.1670/hour in US East (N. Virginia), $122 a month if left running, which puts it mid-table for memory optimized types at the 57th percentile per vCPU ($0.0835 per vCPU-hour) and the 73rd percentile per GiB ($0.0104 per GiB-hour).

It has local instance storage (1 x 75 GB NVMe SSD), which is fast but lost when the instance stops. Network: Up to 25 Gigabit.

Looking beyond its own line, 26 of 44 current types with 2 vCPUs and similar memory are cheaper. The cheapest of those is the r6g.large on AWS Graviton2 at $0.1008/hour.