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March 14, 2004
Postfix smtpd的性能瓶颈分析
smtpd performance ...(zz) ( 2004年3月14日9:25 )
List: postfix-users
Subject: Re: smtpd performance
From: Victor.Duchovni () morganstanley ! com
Date: 2004-03-11 2:23:25
Message-ID:
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On Wed, 10 Mar 2004, Cesar Bonadio wrote:
> The perl program delivers only one message per time so increasing the
> smtpd number
> did not help.
>
message submission latency is the sum of the "smtpd" and "cleanup"
latencies. The main source of latency in "smtpd" is DNS and table lookups
against LDAP, MySQL, or other "expensive" tables. The main source of
latency in "cleanup" is table lookups, body checks and disk I/O latency.
Time the response delay to each of the protocol interactions connect
(response is 220 banner), "HELO", "MAIL FROM:", "RCPT TO", "DATA", and
".", where is the delay?
--
Viktor.
Posted by hzqbbc at March 14, 2004 05:57 AM