The performance control described in this topic is not supported in an APPC scheduling environment.
//*MAIN IORATE=xxx
The IORATE parameter indicates if the job contains a low, medium, or high number of I/O instructions compared to the number of processing instructions. JES3 uses this value to determine the mix of jobs assigned to a processor: using this parameter, JES3 balances processor-bound processing with I/O-bound processing. A correct balance improves throughput.
//*MAIN IORATE=HIGH
//*MAIN IORATE=LOW
//*MAIN IORATE=MED