Manual:$wgMemCachedDebug

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Memcached settings: $wgMemCachedDebug
Will be set to false in Setup.php, if the server isn't working.
Introduced in version:pre 1.1.0
Removed in version:still in use
Allowed values:(boolean)
Default value:false

Details[edit]

Will be set to false in Setup.php, if the server isn't working.