I was wondering what the recommended interval was for caching in WP-Cache. IIRC the default interval is two hours. But if it re-caches pages automatically when they're updated, what's the point in forcing the cache to automatically expire? Wouldn't it be better to set the expiration time to be infinite? Either way, why is the default two hours? I must be missing something here, so if anyone could enlighten me on this issue, that'd be very nice.