Manual:$wgOldRevisionParserCacheExpireTime

Parser Cache: $wgOldRevisionParserCacheExpireTime
The expiry time for the parser cache for old revisions, in seconds.
Introduced in version:1.36.0 (Gerrit change 641240; git #a2ae4192)
Removed in version:still in use
Allowed values:Unspecified
Default value:60 * 60