TRACE and REPLY commands

The following tables indicate the parameters you can specify on TRACE CT commands and a REPLY.

Parameters Allowed on TRACE CT for trace?
ON, nnnnK, nnnnM, or OFF One is required
COMP Required
SUB No
PARM No
Parameters Allowed on TRACE CT for writer?
WTRSTART or WTRSTOP One is required, if a writer is being used
Parameters Allowed on REPLY for trace?
ASID No
JOBNAME No
OPTIONS Yes
WTR Yes

You can change options while a SYSHZS trace is running. However, to change the buffer size, you have to stop the trace and restart it with the new buffer size.