F-SECURE ANTI-VIRUS - FOR MICROSOFT EXCHANGE Administrator's Manual - page 216
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3.8.6
Lists and Templates
Match Lists are lists of file name patterns, keywords, or e-mail addresses
that can be used with certain product settings.
Message Templates can be used for notification messages.
Number of spam
scanner instances
Specify the number of Spam Scanner instances
to be created and used for spam analysis. As
one instance of the spam scanner is capable of
processing one mail message at a time, this
setting defines how many messages undergo
the spam analysis simultaneously.
You have to restart the Content Scanner Server
after you change this setting to take the new
setting into use.
IMPORTANT: Spam analysis is a
processor-intensive operation and each spam
scanner instance takes approximately 25MB of
memory (process fsavsd.exe). Do not increase
the number of instances unless the product is
running on a powerful computer.