- Set MediaWiki to read content meta-data from the new content table.
Set MediaWiki to not populate the ar_text and ar_flags fields.(this has been the case since MW 1.5)- Watch for performance issues caused by adding a level of indirection (a JOIN) to revision loads.
- Set MediaWiki to insert content meta-data ONLY into the new columns in the content table. (To allow this, the old columns must have a DEFAULT).
- Enable MCR support in the API and UI (as far as implemented).
This enables, but does not require: Drop the redundant columns from the page, revision, and archive tables, see Removing Redundant Information above. Schema changes desired for revision storage optimization may be applied at the same time.
See also: https://www.mediawiki.org/wiki/Multi-Content_Revisions/Content_Meta-Data#Phase_III:_Finalize