A good description of this issue can be found here https://issues.couchbase.com/browse/MB-32107?focusedCommentId=317289&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-317289.
Unsure if this will lead to performance gains, however a reduction of cache contention certainly isn't a bad thing and the changes is relatively trivial.
|Field||Original Value||New Value|
|Component/s||memcached [ 11621 ]|
|Resolution||Fixed [ 1 ]|
|Status||Open [ 1 ]||Resolved [ 5 ]|
|Actual End||2019-03-13 06:24 (issue has been resolved)|
|Status||Resolved [ 5 ]||Closed [ 6 ]|