From: adi (adimdgr.padinet.com)
Date: Tue Apr 22 2003 - 15:14:58 CDT

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On Tue, Apr 22, 2003 at 03:17:33PM -0400, Wietse Venema wrote:
> The number of parallel sessions depends on
>
> 1 - How fast the receiving machine can receive mail
>
> 2 - How fast qmgr can schedule delivery requests

in my case, the messages in queue are almost 1-1 mail (1 message
1 recipient).

postfix would try send the message as fast as possible (as I set
smtp_dest_concurrency_limit to 0), and then, of course, it would
overwhelm the receiver. this happen very shortly, i.e I put limit
max parallel incoming connections on the receiving side. postfix
doesn't know that the receiving side would happily accept new mails
(again).

> If you have 44 SMTPD processes pounding on the disk then (2) drops
> to much lower levels.

still trying to find the culprit.

Regards,

P.Y. Adi Prasaja

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