Manual:$wgMsgCacheExpiry

This feature was removed completely in version 1.34.0.

Language, regional and character encoding settings: $wgMsgCacheExpiry
When a message in cache expires (in seconds).
Introduced in version:	1.2.0 (r2203)
Removed in version:	1.34.0 (Gerrit change 532731; git #178d312e)
Allowed values:	Unspecified
Default value:	86400
Other settings: Alphabetical \| By function

Details

Expiry time for the message cache key (in seconds).