The primary focus when selecting memory for a highly available system is stability. It's no accident that most, if not all, server-class RAM is of the error-correcting variety. There are a few other things to consider that may not appear obvious at first glance.
Due to the multi-core nature of our CPUs, the amount of addressable memory may depend on the core count. In addition, speed, latency, and parity are all considerations. We also must include the number of channels reported by each CPU; failing to match this with an equal count of memory sticks can drastically degrade performance.
This recipe will help ensure our server remains fast and stable by considering memory options.
