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Feizhou
*nix forums Guru Wannabe
Joined: 15 Mar 2005
Posts: 131
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 Posted: Mon Jun 19, 2006 4:15 am Post subject:
Re: High SMTP input rates; slow processing
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Edward F. Klimowicz wrote:
| Quote: | I have a qmail server. It currently accepts a high volume of incoming mail
... hundreds of messages per minute. It's not maxing out the processor,
memory, or disk. The system, in fact, doesn't seem to be under much load at
all. There is no filtering of mail going on; this server just accepts mail
and routes it back out. However, qmail simply can't keep up with the influx
of messages. Incoming mail does got processed, but not fast enough; the disk
will eventually fill up with unprocessed mail.
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Perhaps you can give us some numbers so that we can judge for ourselves.
output from 'vmstat 5' perhaps for the entire or part of the period
where you get a queue buildup placed in some file that we can get our
hands on.
| Quote: |
I haven't been able to find anything anomalous in the logs.
I'm using qmail-1.03 with the doublebounce-trim, big-concurrency, exttodo,
spamthottle, and qregex patches. I've also tried with a LWQ netqmail-1.05
install, with the same results.
Any suggestions?
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Give us more data. We do not provide miracle solutions.
Statistics as outlined above. How large is your concurrency-remote set
to. What filesystem is the queue on. What OS and version are you running. |
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Andrew Richards
*nix forums beginner
Joined: 09 Jan 2005
Posts: 49
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| Posted: Sun Jun 18, 2006 9:27 am Post subject:
Re: High SMTP input rates; slow processing
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On Friday 16 June 2006 21:33, Edward F. Klimowicz wrote:
| Quote: | I have a qmail server. It currently accepts a high volume of
incoming mail ... hundreds of messages per minute. It's not maxing
out the processor, memory, or disk. The system, in fact, doesn't
seem to be under much load at all. There is no filtering of mail
going on; this server just accepts mail and routes it back out.
However, qmail simply can't keep up with the influx of messages.
Incoming mail does got processed, but not fast enough; the disk
will eventually fill up with unprocessed mail.
I haven't been able to find anything anomalous in the logs.
I'm using qmail-1.03 with the doublebounce-trim, big-concurrency,
exttodo, spamthottle, and qregex patches. I've also tried with a
LWQ netqmail-1.05 install, with the same results.
Any suggestions?
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I'd check:
- The logs: See if your concurrency limits are being reached -
i.e. look for these lines in your qmail logs,
status: local a/x remote b/y
(and see if your 'a' and 'b' values stay well below your 'x' and
'y' limits). Adjust control/concurrency[local|remote]
accordingly if you're hitting their limits
- Your directory permissions in /var/qmail/queue/lock:
# ls -l /var/qmail/queue/lock
-rw------- 1 qmails qmail 0 Jan 15 2003 sendmutex
-rw-r--r-- 1 qmailr qmail 1024 Jun 18 09:51 tcpto
prw--w--w- 1 qmails qmail 0 Jun 18 10:06 trigger
(the above is what you'd expect - particularly check everything
matches for 'trigger').
I'd also suggest fixing the problem with the LWQ netqmail-1.05
installation you describe before trying to solve the problem with the
patched setups you describe - in case there is any issue with one of
the patches, or they have an interoperability issue.
Please let the list know how you get on. If these suggestions don't
help, please supply more info - take a look at,
http://pyropus.ca/personal/writings/12-steps-to-qmail-list-bliss.html
to see what info the list needs to better answer your question.
cheers,
Andrew.
--
======================================================================
Network Design & Build http://www.nwdb.co.uk/
* Custom email solutions * Systems Administration * Networking
====================================================================== |
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Edward F. Klimowicz
*nix forums beginner
Joined: 22 Feb 2006
Posts: 4
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| Posted: Fri Jun 16, 2006 8:33 pm Post subject:
High SMTP input rates; slow processing
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I have a qmail server. It currently accepts a high volume of incoming mail
.... hundreds of messages per minute. It's not maxing out the processor,
memory, or disk. The system, in fact, doesn't seem to be under much load at
all. There is no filtering of mail going on; this server just accepts mail
and routes it back out. However, qmail simply can't keep up with the influx
of messages. Incoming mail does got processed, but not fast enough; the disk
will eventually fill up with unprocessed mail.
I haven't been able to find anything anomalous in the logs.
I'm using qmail-1.03 with the doublebounce-trim, big-concurrency, exttodo,
spamthottle, and qregex patches. I've also tried with a LWQ netqmail-1.05
install, with the same results.
Any suggestions? |
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