连续两天分别在凌晨02：14和凌晨02：18 rac的节点一重启，alert日志如下：
Errors in file /u01/app/oracle/diag/rdbms/datahub/datahub1/trace/datahub1_pmon_145356.trc:
ORA-00600: internal error code, arguments: [17147], [0x7CFEFA3A00], [], [], [], [], [], [], [], [], [], []
PMON (ospid: 145356): terminating the instance due to error 472
Wed Jun 03 02:18:10 2020
opiodr aborting process unknown ospid (132122) as a result of ORA-1092
Wed Jun 03 02:18:10 2020
opiodr aborting process unknown ospid (11753) as a result of ORA-1092
Wed Jun 03 02:18:10 2020
opiodr aborting process unknown ospid (167127) as a result of ORA-1092
Wed Jun 03 02:18:10 2020
ORA-1092 : opitsk aborting process
System state dump requested by (instance=1, osid=145356 (PMON)), summary=[abnormal instance termination].
System State dumped to trace file /u01/app/oracle/diag/rdbms/datahub/datahub1/trace/datahub1_diag_146113_20200603021814.trc
Instance terminated by PMON, pid = 145356
Wed Jun 03 02:18:32 2020
Adjusting the default value of parameter parallel_max_servers
from 3600 to 2970 due to the value of parameter processes (3000)
Starting ORACLE instance (normal)