[Dovecot] Too many open files, etc.

[Timo Sirainen]

On Mon, 2005-02-28 at 11:39 +0100, Martin Preen wrote:
> Hello,
> a few days ago I switched out UW-server installation to
> dovecot 0.99.14 (Solaris 9). There were a few client issues,
> but mostly the migration was ok.
> 
> But I have still some questions/problems:
> 
> +) dovecot-auth: ... PAM: pipe() failed: Too many open files
> I increased the max. number of open files. Is this normal
> behaviour, that more than 512 open files are needed ?

Depends on how many logins/sec you have. It's normal if you have >400/s,
but probably not otherwise..

> +) we're using mbox on NFS and index files on local disks.
> When building the index files for the first time, it takes
> (of course) a long time for large folders. But we have these
> users, and this will happen sometimes. Is there a way to
> improve performance ?

1.0-tests / dovecot-stable releases take somewhat less time to do it.

> +) in general dovecot saves a lot of NFS-bandwidth compared
> to UW-imap. Thats what I was looking for. But there also seems
> to be a problem with large inboxes (> 10 MB) and/or large
> attachments. Is this right ?
> 
> One user currently gets this error from Pine when accessing a
> large attachment: MAIL FOLDER "INBOX" CLOSED DUE TO ACCESS ERROR.
> AFAIK this error is related to some timeout problem.
> Has anyone seen this (and a solution for it) ?

Hmm. No idea really.. But I'd rather not spend time trying to figure out
0.99.x bugs. If this is reproduceable with 1.0-tests / dovecot-stable
I'll look at it.

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