oracle 后台告警日志

在使用Oracle数据库时，我们不可避免地要面对各种各样的问题，包括安全、性能、可靠性等方面的问题。其中，告警日志是我们了解这些问题的重要途径之一。

举例来说，当我们执行一条查询语句时，出现了IO错误，导致查询失败。这时，Oracle数据库就会发出一条告警日志，提示我们存在IO错误。通过查看告警日志，我们可以快速定位到问题所在，并进行相应的处理。

Mon Nov 23 14:07:39 2020 Errors in file /oracle/admin/DB1/bdump/db1_j000_1234.trc: ORA-27072: File I/O error Additional information: 4 Additional information: 134217728 Additional information: 280494206 ORA-19502: Write error on file "backup_11182020.bkp" ORA-27072: File I/O error Additional information: 4 Additional information: 134217728 Additional information: 280494206 ORA-19502: Write error on file "backup_11182020.bkp" ORA-27072: File I/O error Additional information: 4 Additional information: 134217728 Additional information: 280494206 ORA-19502: Write error on file "backup_11182020.bkp" ORA-27072: File I/O error Additional information: 4 Additional information: 134217728 Additional information: 280494206 ORA-19502: Write error on file "backup_11182020.bkp"