how many users can Cyrus server support? -- is 5.5 msg/sec sl ow?

[Adam Williams]

>I think you are right. I don't think the bottle neck is Cyrus IMAP. Because
>when I move syslog to the network the performance get 2 times better and
>when I change to a disk striped by 3 disks, I 2 times faster. Right now I
>can get 10 msg/sec. If I can get 15-20 msg/sec, I will be very happy.

If adjusting syslog makes that much of a difference you probably haven't
disabled fsync() on the /var/log/maillog entry (or whatever your
relevant log file is).  Prepending the filename in /etc/syslog.conf with
a "-", thus /var/log/maillog becomes -/var/log/maillog with disables
syslog's fsync() call after each log message.  If you generate alot of
logs those fsync()s will kill your I/O throughput.

Also you set the noatime option on /var/log, and your mail/imap spool
partitions?