Super Slow Queue Processing
UxBoD
uxbod at splatnix.net
Wed Nov 21 08:54:10 GMT 2007
Check what RBLs you are using. A few are no longer active which produces the symptom of slow batch processing.
Regards,
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----- Original Message -----
From: "Richard Frovarp" <Richard.Frovarp at sendit.nodak.edu>
To: "MailScanner discussion" <mailscanner at lists.mailscanner.info>
Sent: Wednesday, November 21, 2007 4:23:46 AM (GMT) Europe/London
Subject: Re: Super Slow Queue Processing
Peter Russell wrote:
> Hi there, we have a MailScanner system that has had a lot (any)
> attention for 6 months or so and all of a sudden it is unable to
> process the messages in the queue faster than they are building up.
>
> Doing an sa -D -t < on any of the high scoring spam messages i have is
> very quick (less than 5sec). there was some error about hash from
> sa-learn --force-expire, a google revealed naught so i disabled bayes
> for now. but it maks no difference.
>
> But changing Use Spamassassin to no means the queue is processed
> lightening quick. which seems weird because SA appears to run quite
> quick.
>
> The messages do eventually seem to get processed but it takes quite a
> while (upto 30min) and the queue seems to be growing muh quicker than
> processing.
>
> MS debug takes AGES.
>
> I cant seem to find anything useful or interesting in the logs, i have
> attached the output of the MS debug (yes i need to update clamav).
>
> Appreciate ANY tips on how to diagnose (or hopefully fix) this. :)
>
> Many thanks
> Pete
Do your lints work? Have you ran sa-update? Are you swapping?
My two guesses would be thrashing or a slow DNS lookup or timeout. If
you are doing your testing on a machine that processed the message or
has access to the same DNS, the result would be cached. You can run
MailScanner --debug --debug-sa to see the SA debug output on a batch.
You might be able to get a feel for where SA is hanging in the process
on incoming messages and it might give you an idea. It's possible you
have been blocked from SpamHaus or are using a service that has been
shut down (hence the sa-update question).
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