ORA-02020错误:过多的数据库连接使用中问题

错误现象： 
ORA-02020: too many database links in use 
Cause: The current session has exceeded the INIT.ORA open_links maximum. 
Action: Increase the open_links limit, or free up some open links by committing or rolling back the transaction and canceling open cursors that reference remote databases. 

再查看参数： 
SQL> show parameter open_links; 

NAME TYPE VALUE 
------------------------------------ ----------- ------------------------------ 
open_links integer 10 
open_links_per_instance integer 4 
 
Oracle默认是4: 

SQL> alter system set open_links=10 scope=spfile; 

重启下数据库就好了!

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