Debug and Trace Facilities › TIUDEBUG Facility › Select Screen Options

Select Screen Options

Execute the TIUDEBUG CLIST by typing TSO %TIUDEBUG on the command line of a CA Gen panel.

The Set Debug Options Screen includes the following options:

CLIST Trace

Specifies to display on your terminal the execution of commands for all CLISTS.

SQL Trace

Specifies to display on your terminal the SQL statement that was being executed when an SQL error occurred.

Procedure Trace

Specifies to trace the flow of control from one program procedure to another.

DPUT Trace

Specifies to display certain key data variables in addition to the Procedure Trace. If used, the Procedure Trace is also specified.

STAT Trace

Specifies if you want a report on the CPU, memory, and I/O service units that are consumed in the processing of the CA Gen component. Use this data to determine execution costs, resource consumption, and so on, and for performance tuning.

DSN Trace

Uses this option only when directed to do so by a Technical Support technician.

Abend option – None

Specifies to suppress a memory dump CA Gen abend. This also frees currently allocated dump data sets.

Abend option – SYSUDUMP

Specifies to produce a memory dump of the current task in the address space CA Gen abend. Only the problem program data is dumped.

Abend option – SYSABEND

Specifies to produce a formatted memory dump of all system information that is associated with the current address space CA Gen abend. This argument is slower and more costly than the SYSMDUMP argument.

Abend option – SYSMDUMP

Specifies to produce an unformatted memory dump of all system information that is associated with the current address space CA Gen abend. This argument is faster and less costly than the SYSABEND argument.

The Abend options allow you to specify if a memory dump is taken CA Gen abend, and if taken, to control the type of dump produced:

• The None option suppresses a memory dump. This is the default.
• A SYSUDUMP typically produces the least amount of output but limits the output to the current task in the address space, and only to problem program data. In some cases, this will not contain enough information to solve a problem.
• The SYSABEND option is not limited to problem program data, and dump all system information that is associated with the current address space. The memory areas are formatted and printed to a report using the dump formatter. This can take quite a long time, especially for large regions with many activities. SYSABEND formats the output file.
• The SYSABEND dump is needed only on the rare occasions when SYSUDUMP does not reveal the underlying cause.
• The SYSMDUMP option also dumps all system areas and problem program areas.
• As with SYSABEND, the memory areas are formatted and printed to a report using the dump formatter, producing a great deal of output. However, SYSMDUMP transfers the memory in pages to the output file without formatting them. The data must be formatted to be readable. Formatting can be accomplished by a utility within z/OS known as AMDPRDMP or print dump.
• Advantages of using SYSMDUMP are:
  • Unformatted SYSMDUMP data can be transmitted to Technical Support, where it can then be formatted for display. This reduces the requirements for disk space, communications time, and costs.
  • SYSMDUMP is fast and probably the least expensive of the dump options.

More information:

Selecting an Options Screen