Cyrus - GFS slow start and poor performace

[Maurizio Lo Bosco]

Hi all,
I know that the usage of the GFS has been discussed for long time on this 
mailing list but I would like to know if it is normal to have a very slow 
start (15 minutes) with just 4300 users (the cyrus db is composed of 20940 
lines).
It happens only with the GFS and the skiplist database; using the flat it 
takes few seconds to start.
The system is composed of 2 IBM x3550 with redhat enterprise linux 5.1 
attached to a SAN IBM DS4700 with an dual fibre channel (4Gb/s multipath 
active-backup).

The dump of the database takes 7 minutes but the disk usage is definitely low 
(less than 5%)
RedHat is saying that there is no way to optimise the performance on the GFS 
locking architecture and they will now take a look to the cyrus code. 

Do you have any tips?

Regards
  Maurizio