<!--- Provide a general summary of the issue in the Title above --> i follow your [performance document](http://docs.couchdb.org/en/2.1.1/maintenance/performance.html#disk-and-file-system-performance)  ## Your Environment <!--- Include as many relevant details about the environment you experienced the bug in --> * Version used: 2.1.1 * Browser Name and version: latest chrome * Operating System and version (desktop or mobile): windows x64 pro