> > I not quite sure that attach synchronization is required for
> _embedded_
> > but it can't hurt performance if your application make something else
> > except of connect\disconnect ;)
>
> Do you mean disconnect calls (eg TIBDatabase.Close) should also be
> serialised in the same way as attach calls?

No, disconnect serialization is not required.
At least my MT tests worked fine without it ;)

Regards,
Vlad