Application trace services
This section describes the application trace services. Application trace comprises the data collection and data display services.
These services track the processing of specific threads through DB2 and display the time stamps, resource usage, and other important workload statistics for each thread (DB2 accounting record) traced. The services use selected Instrumentation Facility Component IDs (IFCID) obtained through the DB2 Instrumentation Facility Interface (IFI).
The following table shows the services used in application trace.
Service | Title | Page |
|---|---|---|
Data Collection Area | ||
ATRAC | DB2 APPLICATION TRACE | |
Trace Displays Area | ||
LTRAC | DB2 TRACE ENTRIES | |
TSTAT | TRACE STATISTICS | |
TSUMA | TRACE SUMMARY BY AUTHID | |
TSUMC | TRACE SUMMARY BY CONNECT | |
TSUML | TRACE SUMMARY BY LOCATION | |
TSUMP | TRACE SUMMARY BY PLAN | |
TSUMR | TRACE SUMMARY BY CORRID | |
TSUMT | TRACE SUMMARY BYTIME | |
STRAC | SUMMARY TRACE ENTRY | |
DTRAC | DETAIL TRACE ENTRY | |
UTRAC | USER DETAIL TRACE | |
The ATRAC service (DB2 APPLICATION TRACE) is a timer-driven service that can be activated multiple times (with different selection criteria and trace types) to trace selectable workloads. The display services show the data collected by an ATRAC request.
A trace entry is made in an internal buffer for each DB2 accounting record selected with the ATRAC service request as described in Collecting-trace-data. These entries are sometimes referred to as transactions, because this terminology is used generally by online systems such as IMS and CICS.
This section contains the following topics:
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