Hi Noel: I just want to control the sending speed of postfix. Because some of ISP complain me that my speed is too fast. So I want to make postfix send a little slowly. I am not sure how can I accomplish this target, so I set up a test ENV to do testing, to make sure how can I implement it. Then I found the problem I describe in my first email, you can see it here:
//************************************************************* HI ALL: I try to understand how the initial_destination_concurrency and default_destination_concurrency_limit work? How can it support to improve the output of delivery. I do a small test. I config the postfix like this: qmgr_message_active_limit = 50 qmgr_message_recipient_limit = 50 initial_destination_concurrency = 10 default_destination_concurrency_limit = 10 default_destination_rate_delay = 10s and then, I send 5 mail to one server, such as t...@a.com, 5 mail for the other server, such as t...@b.com. >From the server side, I can see postfix send mail one by one. For instance, from A.com, I can see 5 mails, each is 10s delay the previous one. B.com is the same with A. So I feel confuse about how can I use initial_destination_concurrency and default_destination_concurrency_limit parameters. Because if I change these 2 parameters to 1, the test result is the same. Does anyone know my problem? How can I make postfix work like the manual described? //************************************************************* >From my test, I can see default_destination_rate_delay is work well. But I do not know why initial_destination_concurrency and default_destination_concurrency_limit not work. Because from the document, I think if initial_destination_concurrency is 10, postfix will use 10 smtp service to do sending. Then that is means 5 mails to the same server will be send out at the same time. But in fact, it looks like postfix setup 2 smtp for 2 servers, A and B. it will send one mail to A and then wait for 10s as my setting. For B it is the same. But how does initial_destination_concurrency and default_destination_concurrency_limit work? Do you understand my means? Best regrads! Coofucoo -----邮件原件----- 发件人: Noel Jones [mailto:njo...@megan.vbhcs.org] 发送时间: 2009年11月11日 3:36 收件人: Coofucoo Zhang; postfix-users@postfix.org 主题: Re: 答复: who know how does initial_destination_concurrency and default_destination_concurrency_limit work? On 11/10/2009 8:51 AM, Coofucoo Zhang wrote: > Hi Petrik: > Thanks. > But could you tell me why? Or which knobs can I use instead? I just want to > control the sending speed of postfix, how can implement? > What's wrong with postfix default delivery scheduling that it needs to be changed? Describe your problem and you might get some expert advice. At least read the docs before you start twiddling knobs. http://www.postfix.org/SCHEDULER_README.html http://www.postfix.org/QSHAPE_README.html http://www.postfix.org/TUNING_README.html
