配置静态监听时SID_NAME名字大小写造成的远程登录失败. 对于oracle数据库来说同样的名字不一样的大小写表示完全不同的数据库实例。一旦静态监听的实例名字与对应的数据库实例不一致时，便会出现无法连接数据库的问题。 由于原来的1521端口要给另一个实例使用,现在的这个实例要使用另外的端口客户的就使用静态监听在设置完重启监听后远程登录出错. SQL> conn test/test@127 ERROR: ORA-01034: ORACLE not available ORA-27101: shared memory realm does not exist Linux-x86_64 Error: 2: No such file or directory 查看oracle home目录和oracle_sid [oracle@ggfwweb admin]$ echo $ORACLE_HOME /u01/app/oracle/10gR2/db [oracle@ggfwweb admin]$ echo $ORACLE_SID hygeia [oracle@ggfwweb admin]$ ps -ef | grep pmon oracle   25830     1  0 09:39 ?        00:00:00 ora_pmon_hygeia oracle   25950 25585  0 09:59 pts/1    00:00:00 grep pmon 查看监听文件文件 [oracle@ggfwweb admin]$ cd $ORACLE_HOME/network/admin [oracle@ggfwweb admin]$ ls listener.ora  listener.ora.bak  samples  shrept.lst  tnsnames.ora [oracle@ggfwweb admin]$ cat listener.ora # listener.ora Network Configuration File: /u01/app/oracle/10gR2/db/network/admin/listener.ora # Generated by Oracle configuration tools. SID_LIST_LISTENER =   (SID_LIST =     (SID_DESC =       (SID_NAME = PLSExtProc)       (ORACLE_HOME = /u01/app/oracle/10gR2/db)       (PROGRAM = extproc)   )     (SID_DESC =        (GLOBAL_DBNAME = HYGEIA)       (ORACLE_HOME = /u01/app/oracle/10gR2/db)       (SID_NAME = HYGEIA)     )   ) LISTENER =   (DESCRIPTION_LIST =     (DESCRIPTION =       (ADDRESS = (PROTOCOL = TCP)(HOST =10.142.11.108)(PORT = 1568))       (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))     )   ) 可以看到监听文件中使用的是HYGEIA,而ORACLE_SID是hygeia 将SID_NAME=HYGEIA修改为SID_NAME=hygeia后重启监听 [oracle@ggfwweb admin]$ lsnrctl stop LSNRCTL for Linux: Version 10.2.0.5.0 - Production on 03-JUL-2014 10:03:32 Copyright (c) 1991, 2010, Oracle.  All rights reserved. Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=10.142.11.108)(PORT=1568))) The command completed successfully [oracle@ggfwweb admin]$ lsnrctl start LSNRCTL for Linux: Version 10.2.0.5.0 - Production on 03-JUL-2014 10:03:53 Copyright (c) 1991, 2010, Oracle.  All rights reserved. Starting /u01/app/oracle/10gR2/db/bin/tnslsnr: please wait... TNSLSNR for Linux: Version 10.2.0.5.0 - Production System parameter file is /u01/app/oracle/10gR2/db/network/admin/listener.ora Log messages written to /u01/app/oracle/10gR2/db/network/log/listener.log Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=10.142.11.108)(PORT=1568))) Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC0))) Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=10.142.11.108)(PORT=1568))) STATUS of the LISTENER ------------------------ Alias                     LISTENER Version                   TNSLSNR for Linux: Version 10.2.0.5.0 - Production Start Date                03-JUL-2014 10:03:53 Uptime                    0 days 0 hr. 0 min. 0 sec Trace Level               off Security                  ON: Local OS Authentication SNMP                      OFF Listener Parameter File   /u01/app/oracle/10gR2/db/network/admin/listener.ora Listener Log File         /u01/app/oracle/10gR2/db/network/log/listener.log Listening Endpoints Summary...   (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=10.142.11.108)(PORT=1568)))   (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC0))) Services Summary... Service "PLSExtProc" has 1 instance(s).   Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service... Service "hygeia" has 1 instance(s).   Instance "hygeia", status UNKNOWN, has 1 handler(s) for this service... The command completed successfully [oracle@ggfwweb admin]$ sqlplus /nolog SQL*Plus: Release 10.2.0.5.0 - Production on Thu Jul 3 10:04:12 2014 Copyright (c) 1982, 2010, Oracle.  All Rights Reserved. SQL> conn / as sysdba Connected. SQL> show parameter local_listener NAME                                 TYPE        VALUE ------------------------------------ ----------- ------------------------------ local_listener                       string SQL> conn test/test@127 Connected. 在配置静态监听时要注意数据库实例名本身是区分大小写的，因此在配置静态监听配置SID_NAME时一定要注意大小写

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