[chef] math expression in attributes/default.rb

[Vasiliy G Tolstov < >]

Does chef supports math expressions in attributes/default.rb ?
I need to set up set_unless[:apache][:prefork][:startservers] depending
on the total memory and some factors..

Does anybody known formula for other apache settings
like this:

set_unless[:apache][:prefork][:startservers]
set_unless[:apache][:prefork][:minspareservers] 
set_unless[:apache][:prefork][:maxspareservers]
set_unless[:apache][:prefork][:serverlimit]
set_unless[:apache][:prefork][:maxclients] 
set_unless[:apache][:prefork][:maxrequestsperchild]

?

Thanks.

-- 
Vasiliy G Tolstov 
<
 >
Selfip.Ru