CAVA Tuning

A long time ago I saw a whitepaper (maybe internal, don't remember) that was on CAVA performance tuning. Specifically, where it was appropriate to do either inclusive or exclusive scanning of files (masks= vs excl=). In looking at all the documentation, it *seems* to point toward inclusive scanning, but there is nothing I've found that specifically says "EMC recommends this or this." I have also run into a lot of places where both the masks and excl parameters are set (which makes no sense to say "scan only this, but be sure to exclude these).

Personally, I have run into nothing but trouble when I set mask=*.* and performance drops off quickly and have always recommended inclusive. I'm looking for recommendations (or that paper) to that effect.

At the end of the virusckecker.conf file there is this list of masks which makes me think *.* is a bad idea.

# masks=*.EXE:*.COM:*.DOC:*.DOT:*.XL?:*.MD?:*.VXD:*.386:*.SYS:*.BIN
# masks=*.RTF:*.OBD:*.DLL:*.SCR:*.OBT:*.PP?:*.POT:*.OLE:*.SHS:*.MPP
# masks=*.MPT:*.XTP:*.XLB:*.CMD:*.OVL:*.DEV
# masks=*.ZIP:*.TAR:*.ARJ:*.ARC:*.Z