From: Noel Jones (no email)
Date: Tue May 01 2007 - 15:39:46 EDT
At 02:12 PM 5/1/2007, Peter Rabbitson wrote:
>If the primary MX is down for an extended period of time and a large
>queue accumulates on the backup, all messages are rushed to the primary
>MX in what it seems separate smtp connections. At least I was able to
>count as many smtp processes in `ps` as 2/3 of the number of queued
>messages, right after I issue `postfix flush`. If I specify explicit
>caching for the particular mx host, things work as expected. I guess
>there is not enough time for the caching on demand to activate when
>doing a flush or having enough queued messages to simulate one.
>
>Peter
Sounds as if you have a large *_destination_concurrency_limit set on
the backup, and the primary isn't able to gracefully handle that many
connections. Don't do that.
http://www.postfix.org/TUNING_README.html#rope
-- Noel Jones
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