I am considering moving a Magento site's DB to Amazon's RDS due to the slow read/write speeds of the current host's shared DB cluster. Other hosted sites at the same place with no DB requirement load amazingly fast, so CPU and memory wise I believe the host is well powered.
Will this effectively have an impact of Magento's performance?
If I calculate the costs correctly it will at least cost $79.20 a month. This is based on the smallest instance available ($0.11*24h*30d). On top comes the traffic increased the costs. Is my interpretation of the price guide correct?
Is the latency using an external DB dramatically higher than an internal (same network) DB?