From: Jorey Bump (no email)
Date: Wed May 02 2007 - 11:39:01 EDT
Wietse Venema wrote:
> Jorey Bump:
>> warning: Connection concurrency limit exceeded: 11 from
>> mx.example.com[192.168.1.2] for service smtp
>
> This record is logged by the SMTP server process, which is
> responsible for RECEIVING mail.
>
> It's always a good idea to consider the entire error record
> not just the last portion.
Aargh. Sorry. Here are the full log entries:
Apr 23 17:30:33 mail postfix/smtpd[25826]: connect from
mx.example.com[192.168.1.2]
Apr 23 17:30:33 mail postfix/smtpd[25826]: warning: Connection
concurrency limit exceeded: 11 from mx.example.com[192.168.1.2] for
service smtp
Apr 23 17:30:33 mail postfix/smtpd[25826]: disconnect from
mx.example.com[192.168.1.2]
>> After reading this guide:
>>
>> http://www.postfix.org/TUNING_README.html#rope
>>
>> I've decided to lower this parameter from the default of 20:
>>
>> default_destination_concurrency_limit = 10
>
> These are for DELIVERING mail.
I've obviously misinterpreted the error. What parameter should I focus
on to address it?
Here's the SMTP portion of my master.cf:
smtp inet n - n - 20 smtpd
-o smtpd_proxy_filter=127.0.0.1:10025
-o smtpd_client_connection_count_limit=10
localhost:10026 inet n - n - - smtpd
-o smtpd_authorized_xforward_hosts=127.0.0.0/8
-o smtpd_client_restrictions=
-o smtpd_helo_restrictions=
-o smtpd_sender_restrictions=
-o smtpd_recipient_restrictions=permit_mynetworks,reject
-o smtpd_data_restrictions=
-o mynetworks=127.0.0.0/8
-o receive_override_options=no_unknown_recipient_checks
The smtpd_client_connection_count_limit=10 is the only parameter in my
configuration that would be exceeded by 11. Is this the culprit?
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