Miserable performance of cyrus-imapd 2.3.9 -- seems to be locking issues

[Zachariah Mully]

On Thu, 2008-02-28 at 16:56 -0600, Kenneth Marshall wrote:
> It may be that the software RAID 5 is your problem. Without the
> use of NVRAM for a cache, all of the writes need all 3 disks.
> That will cause quite a bottle-neck.
> 
> Ken

And if you can, try to get the mailstore over onto a RAID1. RAID5 is
only good for long rebuilds and slow writes. Since you've already got
DRBD setup, can you gank something to add as a second DRBD replica,
which you can either test a single disk setup, or a RAID1 setup?

Z