Disable cache expiration by CHI because it throws assertions such as:
Disable cache expiration by CHI because it throws assertions such as:

Caching object <...> failed: Assertion (iterator returned undef, cache should be empty) failed!
at <...>/local/lib/perl5/Carp/Assert.pm line 340, <GEN1> line 106858.

Also, http://permalink.gmane.org/gmane.comp.lang.perl.modules.cache/97 advises against using "max_size" with CHI::Driver::File

berkmancenter/mediacloud,berkmancenter/mediacloud,berkmancenter/mediacloud,berkmancenter/mediacloud,berkmancenter/mediacloud