Recently we announced the availability of Amazon Elastic Compute Cloud (Amazon EC2) R8a instances, the latest addition to the AMD memory-optimized instance family. These instances are powered by the 5th Generation AMD EPYC (codename Turin) processors with a maximum frequency of 4.5 GHz. In this post I take these instances for a spin and benchmark MySQL later on, but first I discuss the top things you should know about these instances.
Notable characteristics of R8a instances
Each vCPU on an R8a instance corresponds to a physical CPU core (something we started on 7th generation AMD instances). This means that there is no simultaneous multi-threading (SMT). Each vCPU mapped to a dedicated physical core, which means that you get more predictable and consistent performance because there’s no resource sharing or potential interference between threads, which is particularly crucial for performance-sensitive workloads where consistent latency is essential. When…
