>> Much care must be taken when doing so; this strategy was taken with
>> eRServer, and occasionally lead to some (ahem) "unfortunate
>> deadlocks."
>
> Which was required because the design was done agains PG 7.1, where no
> lazy vacuum existed.

It's not in the official 745 tree either, is it? I know we've got it in
the -afilias tree that we use in production. But we've never been able to
find time to send it through QA so haven't actually been able to enable it
in production.

Drew