Serial or parallel sort message

The sort for WorktableN is done in Serial.
The sort for WorktableN is done in Parallel.

These messages indicate whether a serial or parallel sort was performed for a worktable. They are printed after the sort manager determines whether a given sort should be performed in parallel or in serial.

If set noexec is in effect, the worktable is not created, so the sort is not performed, and no message is displayed.