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最近在使用以前服务器的listner的时候,出现“不能识别当前的链接”,找了很多资料很少无奈,后来静下来想了一下客户端坚挺不到Oracle,说明是服务器dispatcher的问题:查看了一下dispatcher的参数:SQL>show parameter dispachers;NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
dispatchers                          string
max_dispatchers                      integer
没有内容,添加一下服务器的配置:SQL>alter system set dispatchers="(ADDRESS=(PROTOCOL=TCP)(HOST=NAME)(PORT=port)) scope=spile;system altered.可以查看一下我们修改的配置:SQL> select name,network,paddr,status from v$dispatcher;NAME                                                                           
----                                                                           
NETWORK                                                                        
--------------------------------------------------------------------------------
PADDR    STATUS                                                                
-------- ----------------                                                      
D000                                                                           
(ADDRESS=(PROTOCOL=tcp)(HOST=gyc)(PORT=37090))                                 
2C21A6EC WAIT  另外一个原因是监听不是本地的默认LISTENER监听修改成本地的监听。 SQL>alter system set local_listener="local_listener";查看一下本地的监听:SQL> show parameter local_listener;NAME                                 TYPE        VALUE                         
------------------------------------ ----------- ------------------------------
local_listener                       string      (ADDRESS=(PROTOCOL=TCP)(HOST=g
                                                 yc)(PORT=1522))    静态监听和动态监听:[oracle@gyc ~]$ lsnrctl statusLSNRCTL for Linux: Version 10.2.0.1.0 - Production on 04-AUG-2011 22:07:39Copyright (c) 1991, 2005, Oracle.  All rights reserved.Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=gyc)(PORT=1521)))
STATUS of the LISTENER
------------------------
Alias                     LISTENER
Version                   TNSLSNR for Linux: Version 10.2.0.1.0 - Production
Start Date                04-AUG-2011 20:48:53
Uptime                    0 days 1 hr. 18 min. 46 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   /opt/oracle/product/10.2.0/db_1/network/admin/listener.ora
Listener Log File         /opt/oracle/product/10.2.0/db_1/network/log/listener.log
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=gyc)(PORT=1521)))
Services Summary...
Service "PLSExtProc" has 1 instance(s).
  Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
Service "orcl" has 1 instance(s).
  Instance "orcl", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully 
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