Just check that the gap between the oldest active transaction and the
next transaction is not too big.

Set

--- In firebird-support@yahoogroups.com, "mysha_cz" wrote:
> Last question:
> which parameters in statistics I should observe to be sure, that no
> one transactions is opened?
>
> >
> > It won't give anything back to the operating system, but the oldest
> > active transaction will move on to the next open transaction and
> > Firebird can reuse the space occupied by the now obsolete records
> > rather than have to acquire more space.