Getting a Cache::SharedMemoryCache started

[Matt]

I want to cache some values in my handlers so they don't keep having to
look stuff up, and so I figured a Cache::SharedMemoryCache would be the
way to go.

I'm a little confused as to where to set the little fella up tho'. Is it
as simple as saying:

my $cache = new Cache::SharedMemoryCache( $options );

in my sub handler() { ... } ?

If I've got it wrong, can someone give me a clue?

Thanks in advance

Matt