9.5. Master trace
Master trace maintains a table of the system messages that are routed to the hardcopy log. This creates a log of external system activity, while the other traces log internal system activity. Master trace is activated automatically at system initialization, but you can turn it on or off using the TRACE command.
Master trace can help you diagnose a problem by providing a log of the most recently issued system messages. For example, master trace output in a dump contains system messages that may be more pertinent to your problem than the usual component messages issued with a dump.
Use the master trace to show the messages to and from the master console. Master trace is useful because it provides a log of the most recently-issued ...
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