> You need to consider the difference between the Oldest Interesting
> Transaction (OIT) and the Oldest Active Transaction (OAT). If the
> difference between those two is greater than the sweep interval, the
> sweep will automatically run and clear "garbage" from the database.

Really, you should consider OST-OIT, not OAT-OIT, because of :

> The oldest snapshot transaction (OST) is normally the same as the OAT
> and indicated, basically, the transaction number beyond which a sweep
> will not clear out "garbage".

Regards,
Vlad