Considerations: Specifying 2 or more conversion processors alleviates constraints in converter processing. However, when you define multiple converter PCEs, or if you accept the default of ten converter PCEs, jobs will not always be queued for execution in the order in which they were submitted. Setting CNVTNUM=1 can be a way to run jobs in the order in which they were submitted; either you must have a single member MAS to do this or if you have a multi-member MAS, the system affinity of each job must be the same. With CNVTNUM=1, the system can "hang" depending on the characteristics of the job stream. See z/OS JES2 Initialization and Tuning Guide for more information on job queuing and how to control job execution sequence.

Modification: Hot start.

Performance Considerations: To alleviate constraint in output processing, use this parameter to define up to 10 output processors (PCEs) per JES2 member. This will provide improved throughput of JES2 output processing if output queuing is constrained. The use of multiple output processors causes JES2 to build more JOEs per unit of time, further increasing checkpoint I/O efficiency. JES2 will, however, consume more system resources (JES2 buffers, processor cycles, and spool I/O) in a shortened period of time.

Modification: Hot start.

Modification: Hot start.

The number of purge processors specified affects the calculation of the number of SMF buffers specified by the BUFNUM parameter on the SMFDEF statement. See page Parameter Description for SMFDEF for a description of the BUFNUM parameter.

Modification: Hot start.

Modification: Hot start.

Modification: Hot start.