[Dovecot] Tools to analyze status/stats?
sdean at bard.edu
Tue Dec 6 15:02:36 EET 2005
Much of my aggravations with user use/misuse/stupidity traces back to
this simple fact: there is rarely any feedback mechanism in server apps
to indicate to the user the loads their practices cause. It is as if
they were driving a car without a gas gauge, if they had bodies that
didn't feel pain.
/I/ wish that there was some metric that could tell a user the composite
CPU and memory loads their mail usage represents. Of course, I'd also
want the in-the-plans quota representation so that there is storage
feedback as well. Will it work with the Berkely quota?
> Thanks for the info... I will check sendmail/procmail more to see if i
> can idenfity anything.
> As far as tools or reports, I was thinking if I could look at the
> following things I could get a good idea of the status/health of my
> mailserver/imap server...
> - The number of messages per date range, per user, received, delivered
> to each user mail box, and undeliverable messages
> - The number of messages for unknown users or which had any sort of
> delivery problem
> - Any error messages dovecot might produce communicating with the mta.
> I guess the latter would be in my log files somewhere...I've found log
> entries identifying the starting/stopping of dovecot, but haven't come
> across any other messages (which I assume is a good thing and that the
> system is working just fine... and also because I am getting mail ...:-))
> Gary Wolff
> On 12/5/05, *Curtis Maloney* <cmaloney at cardgate.net
> <mailto:cmaloney at cardgate.net>> wrote:
> wolff wrote:
> > Hello,
> > I recently installed dovecot on a server running Debian.
> > I only have 10 users, but we probably have 6Gig of email between us.
> We have only about 20 users, and store around 23 to 25G of
> mail. And that's
> mostly because I was tyrannical about people keeping their
> mailboxes lean until
> we got a new HDD :)
> > Things were working flawlessly for a couple of weeks, and I'm
> still getting
> > email, but the last few days we are getting fewer emails that we
> > do.
> > So although things seem to be working well, everyone is
> suspicious something
> > is wrong due to the lack of email volume.
> > Is there a size limit that dovecot can manage?
> That's mostly dependent on your file system, since you're running
> Maildir. The
> limits will be on "messages per folder" and "single file size",
> both of which
> you are unlikely to have reached.
> > Are there any admin tools to get status messages for dovecot?
> No, but that's not a bad idea. What sort of features would you be
> looking for?
> > Are there any reporting tools to show how many messages are
> > processed/managed by dovecot?
> Well, there are a few options and patches that make it easier to
> see how many
> messages people are reading with Dovecot... but since it's the
> _ingress_ of mail
> you're suspecting, I'd be looking at your MTA logs (
> sendmail/postfix/qmail/exim/whatever ) -- if the MTA isn't seeing
> the mail,
> there's no way Dovecot can, either.
> Curtis Maloney
> cmaloney at cardgate.net <mailto:cmaloney at cardgate.net>
Stewart Dean, Unix System Admin, Henderson Computer Resources
Center of Bard College, Annandale-on-Hudson, New York 12504
sdean at bard.edu voice: 845-758-7475, fax: 845-758-7035
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