r7iz.xlarge

Analysis

The r7iz.xlarge is a memory optimized instance in the r7iz series with 4 vCPUs and 32 GiB of memory on Intel Xeon Scalable (Sapphire Rapids) (up to 3.9 GHz), which makes it memory-heavy at 8 GiB of memory per vCPU.

Within the same generation and size, the r7g.xlarge on AWS Graviton3 costs $0.2142/hour, 42% less ($115 a month), though switching means rebuilding software for arm64. The other variants are the r7i.xlarge at $0.2646, the r7gd.xlarge at $0.2722 and the r7a.xlarge at $0.3043.

Running it in N. Virginia instead of Tokyo saves $59.86 a month per instance: $0.3720/hour against $0.4540/hour, a 22% spread. It is not offered in Canada Central, São Paulo, London, Mumbai, Singapore and Sydney, so plan around that if you need a presence there.

On demand it costs $0.3720/hour in US East (N. Virginia), $272 a month if left running, which puts it mid-table for memory optimized types at the 68th percentile per vCPU ($0.0930 per vCPU-hour) and the 84th percentile per GiB ($0.0116 per GiB-hour).

Looking beyond its own line, 32 of 45 current types with 4 vCPUs and similar memory are cheaper. The cheapest of those is the r6g.xlarge on AWS Graviton2 at $0.2016/hour.

It is size 2 of 8 in the r7iz series. Stepping up to the r7iz.2xlarge gives 8 vCPUs and 64 GiB for $272 more a month. Dropping to the r7iz.large saves $136 a month.