On Tue, 16 Oct 2007, Samuel Moqux wrote:
quoted text
> It seems that Francesco pointed me in the right direction in a private
> message. Cyrus in OpenBSD can't use mmap since it assumes that changes
> in an mmaped file are inmediately seen by VFS system calls. OpenBSD

From the cyrus-imapd OpenBSD pkg DESCR:
[...]
Because of cyrus-imapd+OpenBSD mmap uncompatibility, the server 
runs in compat mode incuring a performance penalty under high load. 
[...]

-- 
Antoine