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2003-09
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Date: Mon, 1 Sep 2003 12:17:39 +1000
From: Martin Cooney To: aussie-isp Message-Id: <AE5415650BE985439A0FA429BA1AAD770E10BBDE@bnc.webcentral.com.au> Subject: RE: Re[2]: [Oz-ISP] RE: [ Oz ISP ] Slow posts |
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Hi All, Interestingly, WebCentral uses Majordomo and has never experienced the slowness conversed about here. I shot a note to one of our Mail Architects for comment and in summary the response was :- ============================ ' The default delivery mode for sendmail causes it to attempt a delivery while the process that calls it waits for a response. If the remote mail server is slow or unreachable, this causes the calling process to block while sendmail communicates with the remote server. sendmail has another delivery mode that causes the message to be queued rather than attempt immediate delivery, '-O DeliveryMode=q'. In this case, messages are queued and sendmail exits immediately, allowing the calling process to invoke sendmail again. The mail is processed for delivery by a sendmail daemon every few minutes. I surmise that majordomo uses the default behaviour, resulting in slow performance when sending mail to slow remote servers. Since majordomo is single threaded, a slow server is a bottleneck for the whole shebang.' ============================ Hopefully someone might find this useful. Martin Cooney Vice President - Technical Support, Asia/Pacific. www.WebCentral.com Level 5 100 Wickham Street Fortitude Valley 4006 Ph: 1800 800 099 Fx: 1800 640 098 Email: m a r t i n c @ w e b c e n t r a l . c o m Australia's #1 Internet Web Hosting Company ********************************************************************** The information contained in this email message may be confidential. If you are not the intended recipient any use, distribution, disclosure or copying of this information is prohibited. If you receive this email in error, please tell us by return email and delete it and any attachments from your system. ********************************************************************** -----Original Message----- From: Ben Short [m a i l t o : b s h o r t @ s h o r t b o y . n e t Sent: Saturday, 30 August 2003 10:53 AM To: a u s s i e - i s p @ a u s s i e . n e t Cc: Kai Jones Subject: Re[2]: [Oz-ISP] RE: [ Oz ISP ] Slow posts Hello All, >> On 29 Aug 2003, at 10:12, Kai Jones pontificated from upon high: >> I sent a ping to the list at 08:20 and the reply came through about five >> seconds ago, time here is now 10:12 .....this is the only mailing list I'm >> on where there's a large delay. This has a lot to do with the fact the list is running on majordomo. Majordomo processes mail one at a time, and will not send the next mail until the last one has been sent. Majordomo will sit there and keep retrying to send email if the connection times out etc, before sendmail tells it to give up (4 hour default), it will then move on to the next email. This is why its so incredibly slow, and why I moved all my lists to mailman, that runs multiple threads to send mail - it just dumps all to sendmail, and lets sendmail worry about the queuing - most mail seems to be out within 10 mins with mailman :) Ben -- Best regards, Ben m a i l t o : b s h o r t @ s h o r t b o y . n e t ---- email "unsubscribe aussie-isp" to m a j o r d o m o @ a u s s i e . n e t to be removed. ---- email "unsubscribe aussie-isp" to m a j o r d o m o @ a u s s i e . n e t to be removed. |
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