cpan perl module - plperlu danger?

Hi,

I would like to access a cpan perl module (FSA::Rules) in a perl
procedure, inside Postgresql 8.1.4. FSA::Rules is a library that allows
you to define a finite state machine in perl. No disk access.

In order to to that, I need to use plperlu instead of plperl. And it
works just fine.

What exactly is the danger using a cpan library under plperlu? How can I
make sure it won't crash my system, even when run concurrently by a few
people?

Thanks!

----------------------------------
Philippe Lang, Ing. Dipl. EPFL
Attik System
rte de la Fonderie 2
1700 Fribourg
Switzerland
http://www.attiksystem.ch

Tel:  +41 (26) 422 13 75
Fax:  +41 (26) 422 13 76