Manual:$wgContentHandlerUseDB

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Miscellaneous settings: $wgContentHandlerUseDB
Whether to use the database fields introduced by the ContentHandler facility
Introduced in version:1.21.0
Deprecated in version:1.34.0 (Gerrit change 535666; git #165d3cc5)
Removed in version:1.35.0 (Gerrit change 589018; git #385ab887)
Allowed values:(boolean)
Default value:true

Details[edit]

Set to false to disable use of the database fields introduced by the ContentHandler facility. This way, the ContentHandler facility can be used without any additional information in the database. A page's content model is then derived solely from the page's title. This however means that changing a page's default model (e.g. using $wgNamespaceContentModels ) will break the page and/or make the content inaccessible. This also means that pages can not be moved to a title that would default to a different content model.

Overall, set to false, no database updates are needed, but content handling is less robust and less flexible.