问题描述
故障现象：
1、2#09:05/09:57发生2次数据库重启；
2、1#数据库alertlog有大量IPC send timeout错误报出来。
2019-11-20T09:05:22.546713+08:00
Instance terminated by LMHB, pid = 16359
2019-11-20T09:05:22.548287+08:00
Warning: 2 processes are still attach to shmid 3080201:
(size: 24576 bytes, creator pid: 14528, last attach/detach pid: 16294)
2019-11-20T09:05:23.051247+08:00
USER (ospid: 17111): terminating the instance
2019-11-20T09:05:23.053027+08:00
Instance terminated by USER, pid = 17111
2019-11-20T09:05:25.136753+08:00
Starting ORACLE instance (normal) (OS id: 18239)
2019-11-20T09:05:25.155853+08:00
CLI notifier numLatches:89 maxDescs:8500
2019-11-20T09:05:25.164135+08:00
…
2019-11-20T09:57:22.189510+08:00
License high water mark = 353
2019-11-20T09:57:27.613988+08:00
Instance terminated by USER, pid = 19418
2019-11-20T09:57:27.615533+08:00
Warning: 2 processes are still attach to shmid 4718601:
(size: 24576 bytes, creator pid: 18239, last attach/detach pid: 19330)
2019-11-20T09:57:28.190667+08:00
USER (ospid: 5256): terminating the instance
2019-11-20T09:57:28.192611+08:00
Instance terminated by USER, pid = 5256
