查看GI日志：切换到grid用户
查看DB日志：切换到oracle的目录下
执行[oracle@swnode1 ~]$ adrci
[oracle@swnode1 ~]$ adrci ADRCI: Release 12.2.0.1.0 - Production on Fri Jul 6 16:05:45 2018 Copyright (c) 1982, 2017, Oracle and/or its affiliates. All rights reserved. ADR base = "/u01/app/oracle" adrci> show homes ADR Homes: diag/clients/user_oracle/host_2908371209_107 diag/rdbms/orcl/gnnt1
alert日志就在上述位置
[oracle@swnode1 ~]$ tail -f /u01/app/oracle/diag/rdbms/orcl/gnnt1/alert/log.xml <txt>Please see the VKTM trace file for more details: </txt> </msg> <msg time=‘2018-07-05T09:12:34.163+08:00‘ org_id=‘oracle‘ comp_id=‘rdbms‘ type=‘UNKNOWN‘ level=‘16‘ host_id=‘swnode1‘ host_addr=‘::1‘ pid=‘23141‘ con_uid=‘1‘ con_id=‘1‘ con_name=‘CDB$ROOT‘> <txt>/u01/app/oracle/diag/rdbms/orcl/gnnt1/trace/gnnt1_vktm_23141.trc </txt> </msg> ^C
原文：https://www.cnblogs.com/-abm/p/9274224.html