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ORA-12519, TNS:no appropriate service handler found

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Release: 2016-06-07 17:27:38
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ORA-12519, TNS:no appropriate service handler found

有时候连得上Oracle数据库,有时候又连不上.

可能是Oracle数据库上当前的连接数目已经超过了它能够处理的最大值.

首先得使用DBA角色登录

select count(*) from v$process --当前的连接数

select value from v$parameter where name = 'processes' --数据库允许的最大连接数

修改最大连接数:

alter system set processes = 300 scope = spfile;

重启数据库:

shutdown immediate;

startup;

--查看当前有哪些用户正在使用数据

SELECT oSUSEr, a.username,cpu_time/executions/1000000||'s', sql_fulltext,machine

from v$session a, v$sqlarea b

where a.sql_address =b.address order by cpu_time/executions desc;

linux

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