我连接数据库时，出现ora_01034:oracle not available
ora_27101: shared memory realm does not exist
我解决的办法是重起计算机，有时可以解决
哪位高人知道，请告诉我，谢谢！
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use command:
c:\set ¦more
to look for ORACLE_SID and ORACLE_HOME in the list
of system variables and make sure these are set correctly.
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When you start the database, a key for the shared memory segment is
calculated based on the contents of ORACLE_SID and ORACLE_HOME. When you
try to connect to the database, your process needs to find the shared
memory segment. It does so by matching your oracle_sid and oracle_home against
this hashed key. (In the case of a network connection, it does this by
using the oracle_sid and oracle_home in the listener.)
Check to see how your environment was set when you started the database
versus how it is set when you're trying to connect. In particular, if the
oracle_home path or the oracle_sid is different in any way,you'll get the
messages:
ORA-01034: ORACLE not available
ORA-27101: shared memory realm does not exist
In my case, I had the sid as lower case for the session that started the
database, and upper case in the listener.ora file.