Re: [AMaViS-user] amavis process eats memory, bogs down

Henry,

> i'm having trouble with amavis processes occasionally consuming
> a lot of memory and CPU, and i have yet to pinpoint a cause.

> wouldn't the process limitations ($child_timeout) kill these
> processes eventually?

Not necessarily, especially if the consumer is within SA.
There is only one general purpose timer in Unix, used by both
the amavisd-new and also by SA, which uses it for its own purposes.
Even worse, if a CPU loop happens within evaluation of a single
Perl expression (e.g. while evaluating a complex (or clumsily written)
regular expressions), the timer signal can not abort the evaluation.

> SA check: 27525568 (99%),
> 27,000 seconds? that's a long time.

The amavisd-nanny utility is able to abort such runaway process,
but you need a newer version of amavisd-new for that.

> i'm running amavisd-new-20030616-p9 (debian testing) which may be
> my problem. i wish the package maintainers would update the package.
> i guess i'll upgrade when the system load goes down.
> anyway. wondering if anyone has any ideas. platform is Cyrix Centaur
> 1 Ghz, 512 mb ram. system typically processes 10k messages a day, with
> a load average of around 1.
> spamassassin 3.0.1-1
> perl 5.8.4-4
> clamav 0.83-2

If the problem is repeatable by sending the same message, then
you may be able to narrow down the problem section with enabled
SA debugging ($sa_debug=1; or: amavisd debug-sa).

Mark


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