SYSDUMP component trace

Before using this component trace, ensure that you have read: SDUMP component trace is described by the following attributes:
  • Trace buffers reside in 64-bit common storage area. Size is controlled by the TRACE CT operator command.
  • Tracing is activated during DUMPSRV address space initialization.
  • SDUMP CTRACE is captured at the end of the SDUMP capture phase and dumped at the end of the dump. If the trace data is needed at other times, you must request a new dump to collect the SDUMP CTRACE.
  • The MVS™ component trace (CTRACE) external writer can also capture SDUMP CTRACE.
  • Trace options revert to minimal event tracing when the operator turns the trace off.

The following table summarizes the information required to request a SYSDUMP component trace for SDUMP.

Information For SYSDUMP:
Parmlib member CTIDMPxx; Default member: CTIDMP00
Default tracing Yes; full tracing
Trace request OPTIONS parameter In CTIDMPxx and REPLY for TRACE CT command
Buffer
  • Default: 4MB
  • Range: 4MB – 32MB
  • Size set by: CTIDMPxx parmlib member or TRACE CT command
  • Change size after IPL: Yes
  • Location: 64-bit Common Storage Area
Trace records location 64-bit Common Storage Area; trace data sets
Externalizing trace data Included in every SDUMP; can also use external writer to write data to a trace data set
Trace formatting by IPCS CTRACE COMP(SYSDUMP)
IPCS trace format OPTIONS parameter None
Maximum trace entry size 4050 bytes