Sort_Workfiles=integer

    Specifies the number of sort work files. The default number
    of sort work files is two. When large transactions are being
    extracted, using additional sort work files may improve
    performance by distributing I/O loads over multiple disk devices.
    Use the SORTWORKn (where n is a number from 0 to 9) logical names
    to specify the location of the sort work files.