https://bugzilla.wikimedia.org/show_bug.cgi?id=45584

--- Comment #2 from Brion Vibber <[email protected]> ---
Separating this query into batches means you'll get an inconsistent dump,
unless you use a transaction to keep the read state frozen... in which case
you're probably not gaining anything.

Of course if nobody cares about consistency, we could possibly ignore new
revisions after the beginning and it'd be "mostly consistent" except for things
that get deleted during the dump might fully or partially disappear instead of
staying in the snapshot.

Probably still needs to read the whole 'page' table in a consistent transaction
though.

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