Bug #22487 mysql performs extremely slow when creating unique indexes on huge table
Submitted: 19 Sep 2006 17:57 Modified: 14 Mar 2007 12:00
Reporter: Alexander Valyalkin Email Updates:
Status: Verified Impact on me:
Category:MySQL Server: DDL Severity:S5 (Performance)
Version:5.0.26 OS:Any
Assigned to: Assigned Account CPU Architecture:Any
Tags: Contribution

File: Maximum allowed size is 3MB.

If the data you need to attach is more than 3MB, you should create a compressed archive of the data and a README file that describes the data with a filename that includes the bug number (recommended filename: mysql-bug-data-22487.zip) and upload one to sftp.oracle.com. A free Oracle Web (SSO) account (the one you use to login bugs.mysql.com) and a client that supports SFTP are required in order to access the SFTP server.

To upload the file to sftp.oracle.com:

  1. Open an SFTP client and connect to sftp.oracle.com. Specify port 2021 and remote directory /support/incoming/.
  2. Log in with your newly created Oracle Web account (email address) and password.
  3. Upload the archive to /support/incoming.
  4. Once you have uploaded the file, add a comment to this bug to notify us about it.
Example: sftp -oPort=2021 -oUser=email sftp.oracle.com:/support/incoming

Usage Notes: This directory is unlistable, which means that once you have uploaded your file, you will not be able to see it. A file cannot be uploaded more than once with the same filename. The filename must be changed before attempting to upload the file again. The filename should always start with mysql-bug- prefix. Files are retained on the SFTP server for 7 days and then permanently removed.

[13 Oct 2006 14:55] Alexander Valyalkin
sql/sql_table.cc diff for mysql 5.0.24

Attachment: sql_table.cc.diff (application/octet-stream, text), 7.34 KiB.

[24 Oct 2006 16:14] Alexander Valyalkin
updated patch

Attachment: sql_table.cc.diff (application/octet-stream, text), 5.90 KiB.