Well as far as I'm aware avast shouldn't scan the pagefile.sys, however your pagefile.sys is outside the normal c:\pagefile.sys location so only that may be being excluded.
I used to have my pagefile.sys split over two HDDs and used ?:\pagefile.sys in both the:
Program Settings, Exclusions and
Standard Shield, Advanced, Add, list of exclusions.
The question mark ? is a single character wildcard so if you have the pagefile.sys in multiple or a different location that should cater for that.