https://bugzilla.wikimedia.org/show_bug.cgi?id=61111

--- Comment #1 from Nathan Larson <nathanlarson3...@gmail.com> ---
The use case I have in mind is that the forthcoming rewritten
[[mw:Extension:MirrorTools]] will do some schema changes that ALTER the
logging, page, recentchanges, revision, and user tables with AUTO_INCREMENT =
1000000000000000; (i.e. 1 quadrillion). That way, we won't have collisions when
the primary keys for imported log events, pages, recent changes, revisions, and
users from Wikipedia reach high numbers.

The alternative would be to set an auto increment of, say, 3 billion. That
would lead to eventual collisions, though.

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