F-SECURE ANTI-VIRUS FOR MICROSOFT EXCHANGE 8.00 -, Руководство администратора, Страница: 139 / 349

CHAPTER 5 139
Centrally Managed Administration
5.4.6 Threat Detection Engine
Configure the virus outbreak and spam threat detection.
You might need to modify this setting if you
enable Realtime Blackhole Lists (DNSBL/
RBL) for spam filtering. For more
information, see “
Realtime Blackhole List
Configuration ” , 289 .
You have to restart the Content Scanner
Server after you change this setting and
distribute the policy 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.
VOD Cache Size Specify the maximum number of patterns to
cache for the virus outbreak detection service.
By default, the cache size is 10000 cached
patterns.
Class Cache Size Specify the maximum number of patterns to
cache for spam detection service. By default, the
cache size is 10000 cached patterns.
Increasing cache sizes may increase the threat
detection performance but it requires more disk
space and may degrade the threat detection
rate. Cache sizes can be disabled (set the size
to 0) for troubleshooting purposes.