Thanks Rick, according to that article one db2ckpw process exist per instance but I am seeing twice as many of these processes for each instance!!! Our server is a mix of both v7 and v8 instances thus databases.
Always assume that DB2 knows what it is doing. It's best to limit your inspection of its threads and/or processes to "idle curiosity only." A thread/process that is just hanging around waiting for something to do is ... just a process-table entry, nothing more. No harm, no foul.