Query "stopped" in its tracks, still "running"

So, I've got this CREATE TABLE query with a select that has three joins,
and simple selections in the primary table as well as in one of the joined
tables. The query is in a RUNQRY command, which is in a CLLE program. The
program was submitted 40 minutes ago. It took about two minutes for the
indexes to be built, before I saw (via WRKJOB) records being added into the
created table. It took about 5 - 7 minutes to get to just over 5 million
records in the new table, and then the I/O counts on WRKJOB's Display Open
Files screen came to a complete stop. Meanwhile, the CPU time used
continues to climb at a nice pace. The system seems to be giving all of
its resources to my job, which is showing my job taking 547% of the CPU,
while the system as a whole is at 594%. DASD's at 41% used.

Interestingly, the DB Faults and Pages on WRKSYSSTS are zero for all pools,
and this is after about 2 minutes of data collection. I would have
expected the DB Pages to be maxxed out, given how much CPU my job is taking.

Not sure where else to look. Any ideas would be appreciated.

- Dan