/EVENT=(event1[,...])

    Enables tracing on specific events, which you can use wildcards
    to specify. The default is a subset of the events, which includes
    most errors and state changes when the system parameter SYSTEM_
    CHECK is set to 0. The default is "all events included" when
    SYSTEM_CHECK is set to 1.

    Use the SHOW TRACE/CONTEXT command to display event names.