Oracle11g修改open_links参数的方式--并发

内容导读

互联网集市收集整理的这篇技术教程文章主要介绍了Oracle11g修改open_links参数的方式--并发，小编现在分享给大家，供广大互联网技能从业者学习和参考。文章包含3073字，纯文字阅读大概需要5分钟。

内容图文

1、open_links含义OPEN_LINKS_PER_INSTANCE specifies the maximum number of migratable open connections globally for each d

1、open_links含义

OPEN_LINKS_PER_INSTANCE specifies the maximum number of migratable open connections globally for each database instance. XA transactions use migratable open connections so that the connections are cached after a transaction is committed. Another transaction can use the connection, provided the user who created the connection is the same as the user who owns the transaction.

OPEN_LINKS_PER_INSTANCE is different from OPEN_LINKS, which indicates the number of connections from a session. The OPEN_LINKS parameter is not applicable to XA applications.
可能出现的错误：

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.

2、查看open_links

Connected to Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
Connected as SYS
SQL> show parameters open_links;
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
open_links integer 4
open_links_per_instance integer 4

3、修改open_links

alter system set open_links=255 scope=spfile;
alter system set open_links_per_instance=255 scope=spfile;

4、使修改后的open_links生效

修改后查看，发现值没有变化。

SQL> show parameters open_links;
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
open_links integer 4
open_links_per_instance integer 4
SQL> alter system set open_links=255 scope=spfile;
System altered
SQL> alter system set open_links_per_instance=255 scope=spfile;
System altered
SQL>
SQL> show parameters open_links;
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
open_links integer 4
open_links_per_instance integer 4
SQL>

重启一下数据库查看，值修改过来了：

[oracle@eds2db ~]$ dbshut
ORACLE_HOME_LISTNER is not SET, unable to auto-stop Oracle Net Listener
Usage: /u01/app/oracle/db/bin/dbshut ORACLE_HOME
Processing Database instance "wg97": log file /u01/app/oracle/db/shutdown.log
[oracle@eds2db ~]$ dbstart
ORACLE_HOME_LISTNER is not SET, unable to auto-start Oracle Net Listener
Usage: /u01/app/oracle/db/bin/dbstart ORACLE_HOME
Processing Database instance "wg97": log file /u01/app/oracle/db/startup.log
[oracle@eds2db ~]$

SQL> show parameters open_links;
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
open_links integer 255
open_links_per_instance integer 255

，

内容总结

以上是互联网集市为您收集整理的Oracle11g修改open_links参数的方式--并发全部内容，希望文章能够帮你解决Oracle11g修改open_links参数的方式--并发所遇到的程序开发问题。 如果觉得互联网集市技术教程内容还不错，欢迎将互联网集市网站推荐给程序员好友。

内容备注

版权声明：本文内容由互联网用户自发贡献，该文观点与技术仅代表作者本人。本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容， 请发送邮件至 gblab@vip.qq.com 举报，一经查实，本站将立刻删除。

内容手机端

---