If you want to change DFSORT system defaults to improve sort performance, pass information to DFSORT through control statements in the runtime data set IGZSRTCD.
The control statements that you can include in IGZSRTCD (in the order listed) are:
Code control statements between columns 2 and 71. You can continue a control statement record by ending the line with a comma and starting the next line with a new keyword. You cannot use labels or comments on a record, and a record itself cannot be a DFSORT comment statement.
related tasks
Controlling sort behavior
DFSORT Application Programming Guide (Using DFSORT program
control statements)
related references
Default characteristics of the IGZSRTCD data set