On Sun, 2008-10-26 at 10:02 -0700, Brandon Lamb wrote:
I have four amd64 boxes, amd 9850, 4 gig ram, Debian lenny/sid running 2.6.26-1-amd64, using LVS to load balance pop3, imap, smtp traffic. NFS mailstore, 2 gige cards, eth1 being the private nfs backend network, eth0 is what talks to the world.
So the load balancer is randomly assigning the user to different servers? Not really the preferred setup. I guess you've read http://wiki.dovecot.org/NFS?
login_processes_count: 15 login_max_processes_count: 256
This problem and possibly others could maybe be solved by using the high performance mode as described by http://wiki.dovecot.org/LoginProcess
mail_location: maildir:~/:INDEX=/dovecot-index
Are index files on local disk or on NFS?
mail_save_crlf: yes
This adds some extra disk I/O, probably better to set to "no" unless you have a good reason.
mmap_disable: yes mail_nfs_storage: yes
If indexes are on NFS, you should have mail_nfs_index=yes too.
mailbox_list_index_disable: no
These aren't actually always disabled since the code is buggy..
BTW. Are you using Dovecot's deliver for new mails?