Trace flags allow for specialized logging that cuts across many classes. They can be set for user requests by entering the online system in "debug" mode and setting the "trace" flags appropriately. Likewise, they can be set in batch either by interactive prompts for the trace flag values when a job starts or by setting system property values. See the JobSubmitterConfiguration class for specific system property names.
- traceProgramStart, traceProgramEnd, traceProgramStandardOut-These parameters are specific to COBOL programs and will cause entries for the start and end of program execution and enable any embedded logging statements within the COBOL code.
- traceSQL-Causes special detail of SQL being submitted. This can be useful when troubleshooting performance problems.
- traceTime-This can only be enabled for online requests or JUnit tests by setting traceTime(true) on the request context. Enabling time tracing will cause special profiling entries to be placed in the application log for the purpose of attributing request latency to the various layers of the application or to specific SQL statements. These entries are queued in memory until after profiling entries are no longer being generated and then spooled to the logs so as not to corrupt the performance instrumentation with logging overhead. The ProfilingReport standalone Java program can be run to post-process these logs, or a portion of them and generate a report.
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