如何釋放Oracle服務器過多的鏈接數

Oracle服務器鏈接數過多會當掉，把鏈接數過多的客戶機網線拔出後，在遠程Oracle上依然還會保留此用戶的鏈接數，久久不能釋放，上網查了下能夠如下面方法解決。

建立一個容許3分鐘IDLE時間的PROFILE：

SQL> CREATE PROFILE KILLIDLE LIMIT IDLE_TIME 3; 
Profile created.

新建立PROFILE的內容：

SQL> col limit for a10 
SQL> select * from dba_profiles where profile='KILLIDLE'; 
PROFILE RESOURCE_NAME RESOURCE LIMIT 
—————————— ——————————– ——– ———- 
KILLIDLE COMPOSITE_LIMIT KERNEL DEFAULT 
KILLIDLE SESSIONS_PER_USER KERNEL DEFAULT 
KILLIDLE CPU_PER_SESSION KERNEL DEFAULT 
KILLIDLE CPU_PER_CALL KERNEL DEFAULT 
KILLIDLE LOGICAL_READS_PER_SESSION KERNEL DEFAULT 
KILLIDLE LOGICAL_READS_PER_CALL KERNEL DEFAULT 
KILLIDLE IDLE_TIME KERNEL 3 
KILLIDLE CONNECT_TIME KERNEL DEFAULT 
KILLIDLE PRIVATE_SGA KERNEL DEFAULT 
KILLIDLE FAILED_LOGIN_ATTEMPTS PASSWORD DEFAULT 
KILLIDLE PASSWORD_LIFE_TIME PASSWORD DEFAULT 
PROFILE RESOURCE_NAME RESOURCE LIMIT 
—————————— ——————————– ——– ———- 
KILLIDLE PASSWORD_REUSE_TIME PASSWORD DEFAULT 
KILLIDLE PASSWORD_REUSE_MAX PASSWORD DEFAULT 
KILLIDLE PASSWORD_VERIFY_FUNCTION PASSWORD DEFAULT 
KILLIDLE PASSWORD_LOCK_TIME PASSWORD DEFAULT 
KILLIDLE PASSWORD_GRACE_TIME PASSWORD DEFAULT 
16 rows selected.

測試用戶：

 

SQL> select username,profile from dba_users where username='EYGLE'; 
USERNAME PROFILE 
—————————— ——————– 
EYGLE DEFAULT

修改eygle用戶的PROFILE使用新建的PROFILE：

 

SQL> alter user eygle profile killidle; 
User altered. 
SQL> select username,profile from dba_users where username='EYGLE'; 
USERNAME PROFILE 
—————————— ——————– 
EYGLE KILLIDLE

進行鏈接測試：

 

[oracle@test126 admin]$ sqlplus eygle/eygle@eygle 
SQL*Plus: Release 10.2.0.1.0 - Production on Fri Oct 13 08:07:13 2006 
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 and Data Mining options 
SQL> select username,profile from dba_users where username='EYGLE'; 
USERNAME PROFILE 
—————————— —————————— 
EYGLE KILLIDLE

當IDLE超過限制時間時，鏈接會被斷開：

 

SQL> select to_char(sysdate,'yyyy-mm-dd hh24:mi:ss') from dual; 
TO_CHAR(SYSDATE,’YY 
——————- 
2006-10-13 08:08:41 
SQL> select to_char(sysdate,'yyyy-mm-dd hh24:mi:ss') from dual; 
select to_char(sysdate,'yyyy-mm-dd hh24:mi:ss') from dual 
* 
ERROR at line 1: 
ORA-02396: exceeded maximum idle time, please connect again