I had the same problems under high load on a similarly configured
machine (2.0Ghz instead of 2.4Ghz, but other than that about the same).
When I installed the external & big todo patches it helped A LOT, but I
still have some delay in delivery. However it is much more "acceptable"
as messages can be delayed one to two minutes, instead of fifteen to
twenty minutes. Usually things go through fairly instantly.
The single best performance enhancer you could do would be the external
todo patch, from my point of view.
I also found that the chkuser patch also helped a LOT, I highly
recommend using that patch as well.
For reference, I'm not using Bill's toaster, but rather my own custom brew.
Another load reducing method is to use a much faster anti-spam product,
but you will most likely have to pay for that. I suggest MPPd
(messagepartners.com) I've been using it for several years with the
Cloudmark plugin and it is much more effective than spamassassin, with
hundreds of times lower load on the system.
---
- Nick Bright
Network Administrator
Terra World
Tel 888-332-1616 x 315
Fax 620-332-1201
João Luiz - Terra wrote:
Hi Tren,
Sorry. My english is not good :).
My server is dual xeon 2.4 with 2 Gb RAM and HD SCSI 73 Gb.
I have problems with delivery delay when my server is with many
connections POP3 and SMTP.
I use isoqlog to analyze my email traffic, but I don´t have stats of
POP3 and connections with my SMTP (RBL, no delivery, ...). Exists any
software to analyze POP3 and SMTP log?
When my server is slow, I have:
SMTP concurrent: 40 - 50
POP3 concurrent: 20 - 30
Load Average: 30 - 40
I have many SMTP connections with "not existing recipient".
My server was very good. Between last monday and last friday it is very
slow.
How can I identify a possible attack?
Thank you
Joao
----- Original Message ----- From: "Tren Blackburn" <[EMAIL PROTECTED]>
To: <vchkpw@inter7.com>
Sent: Saturday, October 06, 2007 8:02 PM
Subject: RE: [vchkpw] qmail high performance
Hi Joao;
From: João Luiz - Terra [mailto:[EMAIL PROTECTED]
Sent: Saturday, October 06, 2007 3:22 PM
To: vchkpw@inter7.com
Subject: [vchkpw] qmail high performance
Hello,
I am working with qmail toaster by http://www.shupp.org/toaster/.
Is it the better performance instalation?
My server is very slowly :(
You'll need to give something specific here. Bill Shupps Toaster is
widely popular. I use it myself and have no issues with performance.
What are the specifications of the hardware you've implemented it on.
What specifically is performing slow? Is there anything else on this
server? Approximately how many mailboxes are housed on this server?
How many deliveries per second/minute/hour/day (whatever is easiest to
convey) and do you have any idea what your peak concurrent deliveries
are? You need to provide as much information as possible before asking
such a general question.
Regards,
Tren
Esta mensagem foi verificada pelo E-mail Protegido Terra.
Scan engine: McAfee VirusScan / Atualizado em 05/10/2007 / Versão:
5.1.00/5135
Proteja o seu e-mail Terra: http://mail.terra.com.br/
begin:vcard
fn:Nick Bright
n:Bright;Nick
org:Terra World Communications, LLC
adr:Suite #11;;200 ARCO Place;Independence;KS;67301;USA
email;internet:[EMAIL PROTECTED]
title:Network Administrator
tel;work:888-332-1616
tel;fax:620-332-1201
x-mozilla-html:FALSE
url:http://home.terraworld.net
version:2.1
end:vcard
