Smarty Cache Registry folder too big

Hey guys, how do we make this caching more efficient. Bluehost said they were going to shutdown my account because I had stored too many files on the account, it was highlighted over 600,000 files. Then I cleared the cache and manually deleted all the files in /var/cache/registry The table size alone was like 11mb which is rediculous. There are way too many folders in that one directory. Also appending &cc to the end of the url only seams to clear the templates and not the registry folder.

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