[Dovecot] dovecot evaluation on a 30 gb mailbox

[Noel Butler]

On Sat, 2010-06-26 at 01:02 +0100, Timo Sirainen wrote:

> On 26.6.2010, at 0.57, Noel Butler wrote:
> 
> > As I mentioned earlier It doesnt with squirrelmail, I tried it on
> > production and the I/O increased a bit, watching logging alone was
> > giving me a 
> > headache (no, not in debug mode either)..
> 
> How much is "a bit" that the I/O increased? Less than 10%?
> 


perhaps around the 10-15% (see below)


> > So I thought I'd try it on a dev box, in case the cache wasnt large
> > enough, but nope, incidentally imap with evolution works as you indicate
> > it should, but webmail, not a hope in ..... it is login -action logout
> > constantly, imapproxy avoids all this crud, so it obviously does
> > something differently, maybe you find that and incorporate it in
> > dovecot :) that way all this login logout stuff is only seen in say,
> > debug mod?
> 
> It still sounds like the only problem you have is the excessive log messages?.. Sure, Dovecot doesn't even try to get rid of those.
> 


this likely is the sole reason for the I/O increase, but yes. Oh and the
local (replicated) DB was seeing maybe 40 requests a second rather than
only a few, no big deal there though.