Severity at which messages are logged
--log-severity level
log-severity specifies
the level of detail at which to add information to the main log.
levelSeverity threshold at which messages are logged. Valid values are:
error — Notification of
problems or unexpected results.
warning — Events that could
lead to problems if not addressed.
information — High-level
information about major server events.
trace — Detailed information
about the internal state of the server.
The levels are cumulative; specifying information implies warning and error.
Enable all log messages.
--log-severity trace