OLEDB Resource(Session) Pooling (在Ado开发中使用连接池)

  次阅读 作者:智能小宝 来源:互联网 2016-01-14 11:16 我要评论(0)

Oracle: OLEDB Resource(Session) Poolingby Eric Ma EMa@ompus.jnj.comDatabase connectivity is a prerequisite for today's dynamically generated web pages. However, connection to databases is one of the most expensive operations one does from within an ASP page, because of the overhead involved in database user authentication and allocation of database resources to handle user interaction with the database, among other things. All these can add significant latency to your web site. Based on the recent discussions in this list, it is apparent that everyone is keenly aware of this issue and would like to minimize the negative impact on performance by having to connect to databases. For a programmer with a client/server programming background, it is natural for the person to design a solution based on using a database connection that persists through an entire user session. However, for a web-based application, this is a big no-no (see the article at /advice/dbsessionapp.aspfor reasons why you should never do this).The best practice for database connection (we limit our discussion to Oracle here) from an ASP application is to open the connection at late as you can, and close it as soon as you can, which means you open and close database connection on every ASP page. The encouraged practice is to use just one set of Oracle username/password for your entire application, not one set for each user as you may be used to do with client/server applications. Access control is no longer performed by the database, but by your application. You can save the ADO connection string in an application variable in the global.asa file. Some other alternatives include saving it in the windows Registry, or use an include file that has the ADO connection information, and include that file in the pages where database connection is required.Opening a new database connection for each ASP page may not be as bad as you think, because from ADO 2.0 up you can utilize the "resource (session) pooling" feature offered by Microsoft's OLE DB Provider for Oracle. Resource pooling is similar to ODBC connection pooling, where a connection is returned to a pool instead of being destroyed immediately after it is closed and set to nothing in your code. See the following article for more details:

本站文章信息来源于网络以及网友投稿,本站只负责对文章进行整理、排版、编辑,是出于传递更多信息之目的,并不意味着赞同其观点或证实其内容的真实性。如果您有什么意见或建议,请联系QQ28-1688-302!

人工智能实验室
相关文章相关文章
  • 英国研发“杀生”机器人 通过生命体获取能量

    英国研发“杀生”机器人 通过生命体获取能量

  • 无人驾驶汽车如何改变城市生活?听听他们怎么说

    无人驾驶汽车如何改变城市生活?听听他们怎么说

  • 韩春雨称已能重复实验结果 近期将有消息公布

    韩春雨称已能重复实验结果 近期将有消息公布

  • 未来两年人工智能要怎么走?看这篇就够了

    未来两年人工智能要怎么走?看这篇就够了

网友点评网友点评
阅读推荐阅读推荐

据国外媒体报道,在过去两年内,聊天机器人(chatbot)、人工智能以及机器学习的研发和采用取得了巨大进展。许多初创公司正利用人工智能和...

霍金 视觉中国 图 英国著名物理学家霍金(Stephen Hawking)再次就人工智能(AI)发声,他认为:对于人类来说,强大AI的出现可能是最美妙的...

文|郑娟娟 今年,人工智能(AI) 60岁了。在AI60岁的时候,笔者想要介绍一下AI100,一个刚刚2岁的研究项目,但它的预设寿命是100年,甚至更长...

AlphaGo与李世石的人机大战,为大众迅速普及了人工智能的概念。 但对谷歌而言,除了下围棋,现在的人工智能进展到哪一步了?未来,人工智能...