一、更改ORACLE SID名称-CFANZ编程社区

一、更改ORACLE SID名称
1、切换到ORACLE用户，登陆到ORACLE数据库：
 [root@ora10g ~]# su - oracle
 [oracle@ora10g ~]$ sqlplus / as sysdbaSQL*Plus: Release 10.2.0.1.0 - Production on Tue Dec 6 23:52:04 2011
Copyright (c) 1982, 2005, Oracle.  All rights reserved.
 Connected to:
 Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
 With the Partitioning, OLAP and Data Mining options2、查看当前的实例名
 SQL> col host_name format a20
 SQL> select host_name,instance_name,status from v$instance;HOST_NAME            INSTANCE_NAME    STATUS
 -------------------- ---------------- ------------
 ora10g.localdomain   wwl              OPEN3、创建参数文件
 SQL> create pfile from spfile;File created.
4、关闭实例
 SQL> shutdown immediate
 Database closed.
 Database dismounted.
 ORACLE instance shut down.SQL> exit
 Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
 With the Partitioning, OLAP and Data Mining options5、停止监听
 [oracle@ora10g ~]$ lsnrctl stopLSNRCTL for Linux: Version 10.2.0.1.0 - Production on 06-DEC-2011 23:54:53
Copyright (c) 1991, 2005, Oracle.  All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=ora10g.localdomain)(PORT=1521)))
 TNS-12541: TNS:no listener
  TNS-12560: TNS:protocol adapter error
   TNS-00511: No listener
    Linux Error: 111: Connection refused
 Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC0)))
 TNS-12541: TNS:no listener
  TNS-12560: TNS:protocol adapter error
   TNS-00511: No listener
    Linux Error: 111: Connection refused6、检查是否有数据库相关的进程，这里查看到ORACLE的进程都没有启动
 [oracle@ora10g ~]$ ps -ef|grep ora
 root      1907  1885  0 23:49 ?        00:00:00 hald-addon-storage: polling /dev/hdc
 avahi     2086     1  0 23:49 ?        00:00:00 avahi-daemon: running [ora10g.local]
 root      2455  2259  0 23:51 pts/1    00:00:00 su - oracle
 oracle    2456  2455  0 23:51 pts/1    00:00:00 -bash
 oracle    2501  2456  0 23:55 pts/1    00:00:00 ps -ef
 oracle    2502  2456  0 23:55 pts/1    00:00:00 grep ora
 [oracle@ora10g ~]$ ps -ef|grep list
 68        1893  1885  0 23:49 ?        00:00:00 hald-addon-acpi: listening on acpid socket /var/run/acpid.socket
 68        1897  1885  0 23:49 ?        00:00:00 hald-addon-keyboard: listening on /dev/input/event0
 root      2297  2292  0 23:49 tty7     00:00:00 /usr/bin/Xorg :0 -br -audit 0 -auth /var/gdm/:0.Xauth -nolisten tcp vt7
 oracle    2504  2456  0 23:55 pts/1    00:00:00 grep list
 [oracle@ora10g ~]$ ps -ef|grep tns
 oracle    2506  2456  0 23:55 pts/1    00:00:00 grep tns7、修改刚才创建的pfile参数文件，主要添加和修改instance_name和service_names的值为新值：
 [oracle@ora10g ~]$ cd $ORACLE_HOME/dbs[oracle@ora10g dbs]$ ls -rtl
 总计 68
 -rw-r----- 1 oracle oinstall  8385 1998-09-11 init.ora
 -rw-r----- 1 oracle oinstall 12920 2001-05-03 initdw.ora
 -rw-rw---- 1 oracle oinstall  1544 11-17 15:39 hc_wwl.dat
 -rw-r----- 1 oracle oinstall  1536 11-17 15:41 orapwwwl
 -rw-r----- 1 oracle oinstall  2048 11-19 02:47 orawwl02
 -rw-rw---- 1 oracle oinstall    24 11-19 03:12 lkWWL
 -rw-rw---- 1 oracle oinstall  1544 11-19 03:17 hc_wwl02.dat
 -rw-r----- 1 oracle oinstall   667 11-19 03:18 initwwl02.ora
 -rw-rw---- 1 oracle oinstall    24 11-19 03:19 lkWWL02
 -rw-r----- 1 oracle oinstall  2560 11-19 04:22 spfilewwl02.ora
 -rw-r----- 1 oracle oinstall  3584 12-06 23:51 spfilewwl.ora
 -rw-r--r-- 1 oracle oinstall  1038 12-06 23:54 initwwl.ora[oracle@ora10g dbs]$ vi initwwl.ora 
 *.__db_cache_size=218103808
 *.__java_pool_size=4194304
 *.__large_pool_size=4194304
 *.__shared_pool_size=54525952
 *.__streams_pool_size=0
 *.audit_file_dest='/orasoft//admin/wwl/adump'
 *.background_dump_dest='/orasoft//admin/wwl/bdump'
 *.compatible='10.2.0.1.0'
 *.control_files='/oradata/wwl/control01.ctl','/oradata/wwl/control02.ctl','/oradata/wwl/control03.ctl'
 *.core_dump_dest='/orasoft//admin/wwl/cdump'
 *.db_block_size=8192
 *.db_domain=''
 *.db_file_multiblock_read_count=16
 *.db_recovery_file_dest='/oradata/flash_back'
 *.db_recovery_file_dest_size=2147483648
 *.dispatchers='(PROTOCOL=TCP) (SERVICE=wwlXDB)'
 *.job_queue_processes=10
 *.log_archive_dest_1='LOCATION=/oradata/archive'
 *.log_archive_format='%t_%s_%r.dbf'
 *.nls_language='SIMPLIFIED CHINESE'
 *.nls_territory='CHINA'
 *.open_cursors=300
 *.pga_aggregate_target=94371840
 *.processes=150
 *.remote_login_passwordfile='EXCLUSIVE'
 *.sga_target=285212672
 *.undo_management='AUTO'
 *.undo_tablespace='UNDOTBS2'
 *.user_dump_dest='/orasoft//admin/wwl/udump'--添加如下内容
 *.db_name='wwl'
 *.instance_name = wwl01
 *.service_names = wwl01~
 ~
 8、检查刚才添加的参数文件，是否已添加进来。
 [oracle@ora10g dbs]$ cat initwwl.ora 
 *.__db_cache_size=218103808
 *.__java_pool_size=4194304
 *.__large_pool_size=4194304
 *.__shared_pool_size=54525952
 *.__streams_pool_size=0
 *.audit_file_dest='/orasoft//admin/wwl/adump'
 *.background_dump_dest='/orasoft//admin/wwl/bdump'
 *.compatible='10.2.0.1.0'
 *.control_files='/oradata/wwl/control01.ctl','/oradata/wwl/control02.ctl','/oradata/wwl/control03.ctl'
 *.core_dump_dest='/orasoft//admin/wwl/cdump'
 *.db_block_size=8192
 *.db_domain=''
 *.db_file_multiblock_read_count=16
 *.db_name='wwl'
 *.db_recovery_file_dest='/oradata/flash_back'
 *.db_recovery_file_dest_size=2147483648
 *.dispatchers='(PROTOCOL=TCP) (SERVICE=wwlXDB)'
 *.job_queue_processes=10
 *.log_archive_dest_1='LOCATION=/oradata/archive'
 *.log_archive_format='%t_%s_%r.dbf'
 *.nls_language='SIMPLIFIED CHINESE'
 *.nls_territory='CHINA'
 *.open_cursors=300
 *.pga_aggregate_target=94371840
 *.processes=150
 *.remote_login_passwordfile='EXCLUSIVE'
 *.sga_target=285212672
 *.undo_management='AUTO'
 *.undo_tablespace='UNDOTBS2'
 *.user_dump_dest='/orasoft//admin/wwl/udump'
 *.instance_name = wwl01
 *.service_names = wwl01
 ~
 9、并且创建新的密码文件
 [oracle@ora10g dbs]$ orapwd file=orapwwwl01.ora password=oracle;
 [oracle@ora10g dbs]$ cd /orasoft/product/10.2.0/db_1/network/admin/
 [oracle@ora10g admin]$ ls
 listener11113011AM1905.bak  listener.ora  samples  shrept.lst  tnsnames11113011AM1905.bak  tnsnames.ora10、检查监听文件，如果有SID_NAME这个参数，将其修改为新的SID即可，我这里没有，就不修改了
 [oracle@ora10g admin]$ vi listener.ora 
 # listener.ora Network Configuration File: /orasoft//product/10.2.0/db_1/network/admin/listener.ora
 # Generated by Oracle configuration tools.SID_LIST_LISTENER =
   (SID_LIST =
       (PROGRAM = extproc)
     )
   )LISTENER =
   (DESCRIPTION_LIST =
       (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))
     )
   )"tnsnames.ora" 24L, 527C 已写入                                                                                                            
 10、使用刚才修改后的spfile参数启动数据库：
 [oracle@ora10g dbs]$ sqlplus / as sysdbaSQL*Plus: Release 10.2.0.1.0 - Production on Wed Dec 7 00:04:50 2011
Copyright (c) 1982, 2005, Oracle.  All rights reserved.
Connected to an idle instance.
SQL> startup pfile='/orasoft/product/10.2.0/db_1/dbs/initwwl.ora';
 ORACLE instance started.Total System Global Area  285212672 bytes
 Fixed Size                  1218992 bytes
 Variable Size              62916176 bytes
 Database Buffers          218103808 bytes
 Redo Buffers                2973696 bytes
 Database mounted.
 Database opened.11、将刚才创建的pfile参数创建为spfile，以后启动默认使用该spfile参数启动数据库
 SQL> create spfile from pfile;File created.
 
12、检查修改后的SID的名称，我们看到确实是已经修改过来了，但是实例名和DATABASE名称是不会修改的
 SQL> show parameter instance_nameNAME                                 TYPE        VALUE
 ------------------------------------ ----------- ------------------------------
 instance_name                        string      wwl01
 SQL> show parameter service_namesNAME                                 TYPE        VALUE
 ------------------------------------ ----------- ------------------------------
 service_names                        string      wwl01 SQL> select instance_name from v$instance;
INSTANCE_NAME
 ----------------
 wwlSQL> select name from v$database;
NAME
 ---------
 WWL