Speed up ORDERBY query _ MySQL

Source: Internet
Author: User
Accelerate ORDERBY query speed bitsCN.com

Speed up order by Query

To increase the order by speed, you must first check whether MySQL can use indexes instead of additional sorting procedures. If you cannot use an index, follow these policies:

Increase the value of sort_buffer_size.

Increase the value of read_rnd_buffer_size.

Modify tmpdir to point to a dedicated file system with a lot of available space. If you use MySQL 4.1 or update, this option allows multiple paths to use the loop format.

Each path is separated by a colon (':') on Unix, and a semicolon (';') on Windows, NetWare, and OS/2 (';').

This feature can be used to evenly distribute loads to several directories. Note: these paths must be directories distributed on different physical disks, rather than different directories on the same physical disk.


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.