今天丑时，BI的一个数据库挂了，早上到公司同事已经修复好了，告警日志显示的问题是Instance terminated by LGWR。 Wed Dec 06 02:34:59 2017 Errors in file /u01/app/oracle/diag/rdbms/ivlstd3/ivlstd3/trace/ivlstd3_lgwr_40339.trc: ORA-04021: timeout occurred while waiting to lock object LGWR (ospid: 40 ...