[Dovecot] Delay email!

Henrique Fernandes sf.rique at gmail.com
Fri Dec 10 01:31:35 EET 2010

Yeap, already done this! hahahah

now is just 3 process.  maxproc.

We are thinking is use sdbox but we have to be a lot of sure that will help
a LOT  other wise we gona be "stick"  to dovecot for no big reason!

We just did a huge migration from mbox to maildix. Still some problems in
some accounts but is ok!


Other time i saw some one using indexes in local disk. This should help ? i
mean, we would have 2 index one in each server that have imap and pop, so
each tim eindex would have to be written each time it logins on each server
right ? this would not gain lot os performance right ?


On Thu, Dec 9, 2010 at 9:20 PM, Timo Sirainen <tss at iki.fi> wrote:

> On Thu, 2010-12-09 at 17:15 -0200, Henrique Fernandes wrote:
> > I am using postfix + dovecot 2.0.6  + mailman
> >
> > And others 2 serves with only postfix and dovecot writing at same storage
> > with OCFS2.
> >
> > We are having problens with IOwait, and still trying to figure out why
> that
> > is happen!
> sdbox/mdbox format should reduce disk IO compared to maildir.
> > But, problem becomes much worse when some emails are used in mailman,
> when
> > it happens all 3 serves became really slow. iowait goes to 80.
> >
> > Does anyone have an idea how to slow down the dovecot lda ?
> By telling Postfix to limit the number of simultaneous dovecot-lda
> processes. In master.cf you have:
> # service type  private unpriv  chroot  wakeup  maxproc command + args
> So change the dovecot-lda entry's maxproc from "-" to however many
> simultaneous dovecot-ldas you want.

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