When to Scale Up in RDS: 7 Critical Metrics
RDS is Amazon's managed relational database service. While RDS manages your databases maintenance, uptime and upgrade it is your responsibility to determine the cluster's scale and capacity. So the big question is when do you need to scale up? To answer this question you should understand and monitor seven metrics for each server in your cluster. They are: Database connections, Freeable memory, CPU credit balance, Free local storage, Replica lag, Commit latency, Select latency