[Dovecot] A large number of imap processes

Timo Sirainen tss at iki.fi
Thu Apr 24 17:15:19 EEST 2008

On Thu, 2008-04-24 at 16:05 +0200, Claude Frantz wrote:
> Timo Sirainen wrote:
> >> I think that the large number of now running processes is the rebuilding 
> >> of the index. I am right here, Timo ? 
> > 
> > Index updates typically don't take long. Although if client fetches some
> > metadata that isn't in cache file, Dovecot needs to open the messages
> > and parse them. That takes some I/O. This can be avoided with v1.1 by
> > using deliver, since it updates the cache file immediately.
> I have tried it using deliver in the version dovecot-1.0.10-0_66.fc7. 
> Each delivery run was longer when using maildrop, but the load was too
> high too. Do you think that in the version 1.1 the behavior would be 
> different ?

Yes, the main benefit of deliver with Maildir is when it updates the
cache file, but v1.0 deliver doesn't do that.

> NFS is still a problem.

Do you use a single Dovecot server or multiple? v1.1's NFS support for
multiple servers is a lot better than with v1.0.

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