Oracle listener 详解(“DEDICATED” established:0 refused:0)

Oracle listener 详解(“DEDICATED” established:0 refused:0)

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 status

LSNRCTL for Linux: Version 10.2.0.1.0 - Production on 04-AUG-2011 22:07:39

Copyright (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