Oracle High Water level

Source: Internet
Author: User

Oracle High Water level
Http://www.cnblogs.com/chuyuhuashi/p/3548260.html
http://blog.csdn.net/wyzxg/article/details/5631721

Data file is not reduced after data or data partition is deleted. This is the result of the Oracle database high-water mark. Although the data is deleted with delete, the data is no longer in the block, but the original data block is not recycled, but is marked as free. That is, if space is divided into Oracle, the form will be occupied by Oracle, and when new data is inserted, it will look for free space in the space allocated by Oracle to place new data.

Oracle High Water level

Related Article

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.