How to correctly calculate RAM requirement for a bucket in Couchbase

We have a bucket of about 34 million items in a Couchbase 3.0.1 community cluster setup of 6 AWS nodes. The bucket has been allocated 32.1GB of RAM (5482MB per node) and is currently using 29.1GB. If I use the formula provided in the Couchbase documentation ( ) it should use approx. 8.94GB of RAM.

Am I calculating it incorrectly? Below is link to google spreadsheet with all the details.


Is your working set percentage 0.5% or 50%?