HP Integrity NonStop H-Series - Manual (Page 195)

NOTE: Be sure to specify a trace output location that already exists.
4. Press F1.
DSM/SCM begins tracing the execution of the selected component and sends the trace output
to the specified file.
Enabling Host Database Manager Tracing
Create a TRACEHDB file in the ZDSMSCM subvolume:
> CREATE [[$volume.]ZDSMSCM.]TRACEHDB
Host database managers check for this file each time they start up or receive a request, so the
trace file is not created until a host database manager receives a request. Trace files are named
ZZDHnnnn and stored in the ZDSMSCM subvolume.
Only limited tracing is available for host database managers, mainly to track database queries
regarding whether a system generation is required for Build/Apply procedures.
Enabling Object Manager Tracing
To enable Object Manager tracing, create TRACECHK and TRACEOM files in the ZDSMSCM
subvolume. The TRACECHK file must exist when DSMSCM is started. Object Manager tracing can
then be enabled or disabled by creating or purging the ZDSMSCM.TRACEOM file. Object Manager
trace files are created in $SYSTEM.ZDSMSCMT.
Disabling Traces
• “Disabling Component Tracing in NonStop Software Essentials” (page 195)
• “Disabling Component Tracing (ZPHIHMI or ZPHITMI)” (page 195)
• “Disabling Component Tracing (ZPHITI)” (page 195)
• “Disabling Host Database Manager Tracing” (page 195)
• “Disabling Object Manager Tracing” (page 196)
Disabling Component Tracing in NonStop Software Essentials
You can disable an enabled tracing option by removing the check mark next to the option name,
as described in
“Enabling Component Tracing in NonStop Software Essentials” (page 194) .
Tracing does not remain enabled across NonStop Software Essentials sessions; thus, when a new
session is started, all menu items will once again be deselected (disabled) by default.
Disabling Component Tracing (ZPHIHMI or ZPHITMI)
1. On the main menu, enter 99 (Trace) in Selection Number field; then press F1. DSM/SCM
displays the Trace screen.
2. Enter 2 in the Selection Number field; then press F1. Trace is disabled.
Disabling Component Tracing (ZPHITI)
1. On the main menu, enter 9 (Enable trace) in the Selection number field; then press F1.
DSM/SCM displays the Enable Trace screen.
2. Select the DSM/SCM component to disable tracing for, and enter the corresponding number
in the Selection Number field.
3. Press F6.
Disabling Host Database Manager Tracing
Delete the TRACEHDB file in the ZDSMSCM subvolume:
> PURGE [[$volume.]ZDSMSCM.]TRACEHDB
Running Traces on DSM/SCM Components 195