Re: [Exim] Connection hangs

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Author: Philip Hazel
Date:  
To: Thorkild Stray
CC: Exim Users
Subject: Re: [Exim] Connection hangs
On Thu, 1 Mar 2001, Thorkild Stray wrote:

> Yes. What seems to trigger the event is when using the
> smtp_accept_max_per_host.


That is quite an expensive option, because it has to go through the list
of current connections and find out which ones are for the incoming
host (strictly, IP address). It does do this before forking, to prevent
a rougue host causing too much forking.

What value have you set for smtp_accept_max? If you can reduce that, the
testing should speed up.

I've made a note to think about whether the way that the check is done
could be speeded up in Exim 4.

> Any ideas? Has anything changed in 3.22 when it comes to this?


No. There have been no changes to that code for a long time.

-- 
Philip Hazel            University of Cambridge Computing Service,
ph10@???      Cambridge, England. Phone: +44 1223 334714.