If JES2 is slow to process work or respond to operator commands, see the description of the following initialization statements (in z/OS JES2 Initialization and Tuning Reference) and the other noted topics of this information for tuning recommendations:

• BERTNUM= parameter on the CKPTSPACE statement
• DEBUG statement
• JOBNUM= parameter on the JOBDEF statement
• JOENUM= parameter on the OUTDEF statement
• MEMBER(n) initialization statement
• The JES2 health monitor
• Accessing the CKPTn data set in a MAS

In a multi-access spool environment, also refer to the descriptions of the queue control parameters, HOLD= and DORMANCY= on the MASDEF statement and MASDEF queuing parameters for recommended initial parameter value and tuning information.