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Subject: Re: Too many open files error when sending to large list
From: Walter Obergehrer (walter.obergehrersz-testsysteme.de)
Date: Fri Aug 25 2000 - 19:40:15 CDT

> On Fri, Aug 25, 2000 at 05:03:46PM +0200, Walter Obergehrer wrote:
> > BTW: There is no problem sending mail to mikesch - except when mikesch
is in
> > a mailing list.
>
> Is there a special nature of the mailing list? E.g. an internal mailing
list
> of your company organization? Maybe even only an alias with a long number
> of entries.

It _is_ an internal mailing list with about 300 users. But is this special?

> By strolling through the source I could only imagine one cause for
> "been_here()" to fail (I went back to your maillog output, it does fail):
> When the maximum number of table entries is exceeded, the new items are
> not entered to the table anymore and hence they cannot be recognized
> as duplicates anymore.

The trace I did shows, that a .forward file is opened again and again
(1024x), then EMFILE is reported and postfix/local continues to deliver
sucessfully several times and EMFILE occurs again (BTW: I double checked the
.forwards for correctness:)

> In the case of delivering to an alias, one single "local" process has the
> burden to deliver to the recipients, so that the table may be used
heavily.
>
> In this case, it would help to increase the value duplicate_filter_limit
> from the default (1000) to a much higher value. I know, I am just shooting
> into the dark. It might however be worth a try :-)

I'll try this when I'm in the office again. Thank you for the hint!
/Walter