What's the URL of the page containing the problem? not public What steps will reproduce the problem? 1. run memcached -v -vv 2. run two instances of review board by manage.py for instance 3. access to any page and have a look the the memcached output What is the expected output? What do you see instead? whatever the site you will access, the key used for the configuration settings will always be: siteconfig-1-last-updated What operating system are you using? What browser? any/any Please provide any additional information below. In fact, there is a solution: having a separate memcached daemon for each instance of django applicative server who uses the djblets. But is it really accurate? The problem comes from djblets.siteconfig.models, line 118. Do you think that including the web root or web complete url to build the key should be a better idea than one instance of memcached per reviewboard?