Qmail Throughput in 9.0.2

[[email protected]]

Since we updated from 9.0.1 to 9.0.2 the throughput of messages has dramatically sunken, although i dramatically reduced the checks of spamassassin there is a periodical build up of messages in the local queue up to 10000 mails from which he only reduces max. around 300 an hour. As the same problem seems be present on postfix my question is: Has there been something changed in generic message driver that caused this slowdown? Because the message count has not increased only the versions have changed.

 

[105547111]

Try postfix. I got one mailing list with 2000 users it completes mailout in about 4 min 30 to the last user.

 

[Jonathan G]

Apols for butting in with this reply - but I'm trying to get some capacity planning guidelines for the use of qmail on a dedicated server to support a mail-out of up to 40,000 messages in about an hour's (ideally half-hour's) window. It sounds like Product Expert 105547111 (previous reply) is getting about 25,000 - 30,000 an hour. Could I ask you what config of server this is running on? Of course, if anyone can point me to some more general sizing guidelines/practical experience that would be great. Thanks.

 

[105547111]

Hi Jonathan,

Its a redhat / centos server, 64 bit, quad core 3.0 GHz. The limiting factor is spamassassin, SPF and anything filtering the mail, but if your got a dedicated server, with enough power it should be very fast. Other factors are of course the speed of the servers connection, and the remote mail servers speed and the size of emails.

 

[Jonathan G]

Thanks

Thanks for that feedback. Useful detail. At least I can begin to put a budget together. Upsetting that we'll only use its power for a hour a day but there you go.

It's curious that there is so little shared info (at least that can find) about sizing machines for qmail. Assuming that we do embark on the project I should have some real-world experience to share. Apart this forum is there another obvious place to post this experience?

 

[105547111]

I would assume qmail would have support like postfix. Postfix has email lists where you can join up and get anything you need or wanted to know answered. As your now getting into specific area of qmail you should find those details answered by people doing the same thing exactly, saves you trying to reinvent the wheel

Cheers.