1、问题
SQL> shutdown immediate
ORA-01034: ORACLE not available
ORA-27101: shared memory realm does not exist
Linux-x86_64 Error: 2: No such file or directory
SQL> startup;
ORA-27102: out of memory
Linux-x86_64 Error: 12: Cannot allocate memory
Additional information: 26
Additional information: 557060
Additional information: 1677721600
2、处理
获取pfile文件,利用pfile文件启动数据库
[oracle@localhost ~]$ find /u01/ -name 'pfile'
/u01/oracle/app/admin/icdc/pfile
-rw-r-----. 1 oracle oinstall 2058 12月 12 2018 init.ora.11122018161750
启动数据库
SQL> startup pfile='/u01/oracle/app/admin/icdc/pfile/init.ora.11122012161750'
ORACLE instance started.
Total System Global Area 534462464 bytes
Fixed Size 2254952 bytes
Variable Size 213911448 bytes
Database Buffers 310378496 bytes
Redo Buffers 7917568 bytes
Database mounted.
Database opened.