alvherre@commandprompt.com (Alvaro Herrera) writes:
> When there is a single worker processing a database, it does not recheck
> pgstat data after each table. This is to prevent a high-update-rate
> table from starving the vacuuming of other databases.
This case is important; I don't think that having multiple workers
fully alleviates the problem condition.
Pointedly, you need to have a way of picking up tables often enough to
avoid the XID rollover problem. That may simply require that on some
periodic basis, a query is run to queue up tables that are getting
close to having an "XID problem."
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