SRBTIM—Set SRB Timer

SRBs are MVS units of dispatch that can enter infinite loops. If no time-out is set for these SRBs, you may lose the CPU. By default, ULTRAOPT sets a two-second timer for each SRB.

If your data center has been running for an extended period and you are confident that you will not encounter any SRB looping situations, you can increase performance by specifying the NOSRBTIM command to disable the SRB timer. With NOSRBTIM, SRB loops are detected and result in system-completion code S05B.

To turn this command on or off, enter the operator command subsysid SRBTIME | NOSRBTIM from the MVS console. subsysid is the name of the ULTRAOPT subsystem that was established when the product was installed.