Alert Log
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Oracle 19c Server

Oracle 19c Server

Alert Log

Oracle Alert Log

The Oracle alert log is an XML file on the DBMS host containing a chronological log of database messages and critical errors. For backwards compatibility, Oracle also maintains the alert log information in a non-XML file.
File type Path of alert log on DBMS host
XML $ORACLE_BASE/diag/rdbms/CDB-name/instance-name/alert/log.xml
non-XML $ORACLE_BASE/diag/rdbms/CDB-name/instance-name/trace/alert_CDB-name.log

Information note:   Periodically review the Oracle alert log to check for critical messages and errors that may require administrative action.