https://bugzilla.wikimedia.org/show_bug.cgi?id=55398

--- Comment #6 from Sean Pringle <[email protected]> ---
Theortically OK purely from a database maintenance perspective. The revision
table has a primary key and can be altered online, plus disk space is both
available and reclaimable now that innodb_file_per_table is mostly turned on.

The MW code would need to be able to handle a slow switch over (possibly days
on enwiki).

As for the changing queries, first need to see and test examples offline on an
altered slave with production data.

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