故障现象
现象：ADG备库宕机。
数据库告警日志内容如下：
Wed Mar 27 16:15:27 2024
Errors in file /oracle/app/diag/rdbms/orcldb_0/orcldb/trace/orcldb_pmon_287591.trc:
ORA-03170: deadlocked on readable physical standby (undo segment 65535)
Non critical error ORA-48913 caught while writing to trace file "/oracle/app/diag/rdbms/orcldb_0/
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