Webio, I can see how the CPU could be running high with 60k messages in quarantine. Currently, quarantined messages are left in the spool but flagged so they aren't "processed." Because the spool folders are constantly being searched for messages, this explains the high CPU usage. I have added this to our bugs list so that we can re-examine how we deal with quarantined messages.
Hemen, I have added your request for additional options for quarantine length (5 and 10 days) to our features request list. I would also recommend that you start a new thread with this request to facilitate tracking. This thread will be devoted to Webio's original post.