Cyrus - GFS slow start and poor performace

[Maurizio Lo Bosco]

Hi all,
Bron has analysed the problem of the low start and it seams due to the locking 
on the mailbox.db for each mailbox. Something like
//for mailbox in $mailbox_list
  // lock mailbox
  // do something
  // unlock

The lock/unlock seams to be a bottleneck for the GFS.

Using the flat configuration for the mailbox.db the slow start disapepars.
May I use a flat database for 4300+ mailbox?
Do you think I could have other performance problems in delivery/accessing the 
mailbox?
Regards
  Maurizio