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HomeDatabaseMysql TutorialORA-12520错误解决实例

今天突然发现连接数据库时报错,用pl/sql dev连接数据时,有时能连接上,有时连接时报:ORA-12520: TNS: 监听程序无法找到需要的

问题描述:

今天突然发现连接数据库时报错,用pl/sql dev连接数据时,有时能连接上,有时连接时报:

ORA-12520: TNS: 监听程序无法找到需要的服务器类型的可用句柄

通过服务器登录数据库,报下面的报连接数错误:

[Oracle@dbserver22 ~]$ sqlplus"/as sysdba"

SQL*Plus: Release 11.2.0.3.0Production on 星期五 11月 14 10:23:23 2014

Copyright (c) 1982, 2011,Oracle.  All rights reserved.

ERROR:

ORA-00020: maximum number ofprocesses (150) exceeded

请输入用户名:

ERROR:

ORA-01017: 用户名/口令无效; 登录被拒绝

……

SP2-0157: 在 3 次尝试之后无法连接到ORACLE, 退出 SQL*Plus

[oracle@dbserver22 ~]$

和开发沟通了解后,是因为在昨天晚上有新业务上线,业务量增大,导致连接数上升。

解决办法:

增加进程连接数

--停掉监听

[oracle@dbserver22 ~]$ lsnrctl stop

--杀掉连接进程

[oracle@dbserver22 ~]$ ps -ef |grep LOCAL=NO | cut -c 10-15 | xargs kill -9

--增加连接数

SQL> alter system set processes=650 scope=spfile;

系统已更改。

--重启数据库

SQL> shutdown immediate

数据库已经关闭。

已经卸载数据库。

ORACLE 例程已经关闭。

SQL> startup

ORACLE 例程已经启动。

Total System Global Area1.7103E+10 bytes

Fixed Size                  2245480 bytes

Variable Size            6744444056 bytes

Database Buffers        1.0335E+10 bytes

Redo Buffers              21708800 bytes

数据库装载完毕。

数据库已经打开。

SQL> exit

--启动监听

[oracle@dbserver22 ~]$ lsnrctl start

总结:

可能问题的原因很简单,但准确的定位和找出原因是需要经验和技巧的,和开发人员的沟通很重要,最终只要找出原因,解决起来可能就很简单了!

Oracle 单实例 从32位 迁移到 64位 方法 

在CentOS 6.4下安装Oracle 11gR2(x64)

Oracle 11gR2 在VMWare虚拟机中安装步骤

Debian 下 安装 Oracle 11g XE R2

本文永久更新链接地址:

linux

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