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Re: [AMaViS-user] Performance tuning and bayes db
From: Mark Martinec <Mark.Martinec+amavis_at_nospam>Date: Thu Apr 22 2010 - 14:29:08 GMT
To: amavis-user@lists.sourceforge.net
Alex,
> I have a rather large bayes database with spamassassin now, and would
> like to investigate some performance tuning options to optimize memory
> usage and disk access.
>
> I came across this PDF from Marc from a few years ago, and although I
> think it's a bit dated, it looks helpful:
> http://www.ijs.si/software/amavisd/amavisd-new-magdeburg-20050519.pdf
There is also a more recent presentation:
http://www.ijs.si/software/amavisd/amavis-berlin-20090703.pdf
> How can I enable bayes in bdb with a global cache, as it references
> on page 12?
$db_home = "$MYHOME/db";
$enable_db = 0;
$enable_global_cache = 0;
Although it is less effective than it used to be, nowadays when
spam messages are being personalized and virus outbreaks are
less severe.
> Does anyone know where I can find amavisd-nanny to help monitor
> amavisd for message processing issues?
amavisd-nanny comes with the amavis package. It first appeared
in amavisd-new-2.1.0, but was refined in later versions.
> Is it possible to monitor it via SNMP?
Yes, starting with amavisd-new-2.6.4 there is a true SNMP agent
in the amavisd package - see release notes. Also mentioned in
amavis-berlin-20090703.pdf, page 85, with some sample screenshots.
> I'm using an older version of amavisd-new now, but am currently in the
> process of upgrading. In the interim, I'd like to make some
> performance improvements to ease the load until I can upgrade.
Move Bayes and AWL databases to SQL, if you haven't already done so.
See sql/bayes_mysql.sql and sql/README.bayes in the SpamAssassin package.
Using InnoDB and Mail::SpamAssassin::BayesStore::MySQL is a must
(i.e. do not use Mail::SpamAssassin::BayesStore::SQL as a bayes_store_module).
Mark
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