For the last little while, it's been recommended to have enough RAM for your entire working set.[0] While most engines will still work with frequent disk pagin

For the last little while, it's been recommended to have enough RAM for your entire working set.[0] While most engines will still work with frequent disk paging, performance can degrade rapidly. An engine designed for the paging can be smarter about performance, at the cost of performance on smaller datasets. [0] http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/CHAP_BestPractices.html#CHAP_BestPractices.Performance.RAM http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/CHAP_B...