PMON (ospid: 43224): terminating the instance due to error 471

mahan

最近检查数据库运行情况的时候，发现有个11.2.0.4版本数据库的其中一个实例掉了，另外三个实例都是正常状态

进入trace目录查看alter日志发现报错如下：
Sun Jul 30 11:46:47 2023
WARNING: Heavy swapping observed on system in last 5 mins.
pct of memory swapped in [2.29%] pct of memory swapped out [0.48%].
Please make sure there is no memory pressure and the SGA and PGA
are configured correctly. Look at DBRM trace file for more details.
Sun Jul 30 12:24:39 2023
PMON (ospid: 43224): terminating the instance due to error 471
Sun Jul 30 12:24:39 2023
System state dump requested by (instance=1, osid=43224 (PMON)), summary=[abnormal instance termination].
System State dumped to trace file /u01/app/oracle/diag/rdbms/isuper/ISUPER/trace/ISUPER_diag_43235_20230730122439.trc
Dumping diagnostic data in directory=[cdmp_20230730122439], requested by (instance=1, osid=43224 (PMON)), summary=[abnormal instance termination].
Instance terminated by PMON, pid = 43224



经过查询发现是swap不足导致实例宕机，当时swap只有4g

解决办法：
把swap扩展到16g