oracle11g監聽程式無法分發客戶機連接配接,ORA-12518 TNS:監聽程式無法分發客戶機連接配接的解決辦法...

環境：windows XP +Oracle 10g R2

一、listener檔案中的GLOBAL_DBNAME ,SID_NAME可能與執行個體名稱不符，修改後，重新開機listener.

二、專有伺服器模式下processes值設的過小。

可通過以下方法解決：

1.cmd

2.sqlplus

3.connect sys/test as sysdba

4.檢視會話數、processes、sessions

SQL> select count(*) from v$session;

COUNT(*)

----------

45

SQL> show parameter processes

NAME TYPE VALUE

db_writer_processes integer 1

gcs_server_processes integer 0

job_queue_processes integer 10

log_archive_max_processes integer 2

processes integer 50

SQL> show parameter sessions

NAME TYPE VALUE

java_soft_sessionspace_limit integer 0l

icense_max_sessions integer 0

license_sessions_warning integer 0

logmnr_max_persistent_sessions integer 1

sessions integer 60

shared_server_sessions integer

5.修改processes和sessions值:sessions=(1.1*process+5)

SQL> alter system set processes=300 scope=spfile;

系統已更改。

SQL> alter system set sessions=335 scope=spfile;

系統已更改。

6.重新開機資料庫，使更改生效

(不過我沒有重新開機)

三、共享模式下

1.show parameters dispatchers;

show parameters dispatchers;

NAME TYPE VALUE

dispatchers string (protocol=tcp)(service=oracle10xdb)

max_dispatchers integer

2.确定是否有足夠的dispatchers

SQL> select name, (busy/(busy + idle)) "dispatcher busy rate" from v$dispatcher ;

NAME dispatcher busy rate

---- --------------------

D000 .000121704

D001 .000042597

D002 .004935402

如果超過50%，則需要考慮增加更多的dispatchers;

3.改變dispathchers:

SQL>alter system set dispatchers = '(protocol=tcp)(dispatchers=3)(service=oracle10xdb)';

system altered

四、PGA記憶體設定太小

注：該方法沒試過。

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按照如上我的解決方案：

cmd調出指令行視窗

Microsoft Windows XP [Version 5.1.2600]

(C) Copyright 1985-2001 Microsoft Corp.

C:\Documents and Settings\Administrator>sqlplus /nolog

SQL*Plus: Release 10.2.0.1.0 - Production on 月 2月 20 13:45:30 2012

Copyright (c) 1982, 2005, Oracle. All rights reserved.

SQL> connect sys/test as sysdba

Was connected to an idle instance.

SQL> show parameters dispatchers;

ORA-01034: ORACLE not available

SQL> connect SYS/SYSADMIN as sysdba

Was connected to an idle instance.

SQL> select count(*) from v$session;

SQL> show parameter processes

SQL> alter system set processes=1000 scope=spfile;

SQL> alter system set sessions=1100 scope=spfile;

SQL> select name, (busy/(busy + idle)) "dispatcher busy rate" from v$dispatcher ;

重新登入就可以了