If a highly-critical application is I/O bound and the other applications are compute bound, the compute-bound process can use the CPU for the full time quantum if it is not blocked for some other reason.
An I/O-bound process, on the other hand, gives up the CPU each time it performs an I/O operation. Assigning a non-preferred execution class to the compute-bound application enables Adaptive Server to run the I/O-bound process sooner.
