ORA-27101 问题产生的一种原因检查

查看tnsnames.ora文件中查询库SID，例如为：SID = test

ERROR:
ORA-01034: ORACLE not available
ORA-27101: shared memory realm does not exist

 

可以检查下

是否 缺少

 

LISTENER_TEST =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = 127.0.0.1)(PORT = 1521))
  )

 

或者，检查 LISTENER_TEST （SID）与对应的的数据库SID不一致

 

TEST =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = 127.0.0.1)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = test)
    )
  )