This is very minor but it appears to be that ep_max_data_size and ep_max_size represents basically the same value. However, ep_max_size has the value change listener for allowing change its value dynamically. Either remove one of stat if found to be redundant or re-define each stat and its use.
Also, it is probably a good idea to revisit our stats.org and find if there are any more redundant & intermingled case like this for another stats.
|For Gerrit Dashboard: &For+MB-7483=message:MB-7483|
|23849,1||MB-7483: Remove duplicate stats holding bucket size||ep-engine||Status: ABANDONED||0||0|
|26945,3||MB-7483: Remove duplicate stats holding bucket size||ep-engine||Status: MERGED||+2||+1|
|26946,2||MB-7483: Use ep_max_size not ep_max_data_size||ns_server||Status: MERGED||+2||+1|